Mobile Devices

A user reports that the touchscreen on their smartphone is unresponsive in the bottom-left corner but works everywhere else. Which component is most likely failing?

A user reports that their smartphone battery drains significantly faster after a recent OS update. Which of the following should the technician do FIRST to address this issue?

A user's smartphone running Android is unable to connect to any Wi-Fi network. The Wi-Fi toggle is grayed out and cannot be turned on. The technician has tried a soft reset and checked that Airplane Mode is off. Which of the following is the most likely cause?

A user's iPhone will not charge even though the screen is cracked but still displays properly and responds to touch. The technician has cleaned the Lightning port and verified the charging cable and power adapter work with another device. Which component most likely needs replacement?

A user reports that their laptop's touchpad is not working. The technician checks Device Manager and sees the touchpad is not listed. The function key (Fn + F7) that enables/disables the touchpad does not seem to respond. The technician has rebooted the laptop. Which of the following should the technician try NEXT?

A user's Android smartphone screen is flickering intermittently and occasionally goes black for a few seconds before returning. The phone has not been dropped or exposed to moisture. The technician has performed a factory reset, but the issue persists. Which component is the MOST likely cause of the problem?

A user's smartphone will not charge when plugged into a wall charger. The technician tests the charger with another phone and it works correctly. The technician then inspects the charging port on the smartphone and notices debris inside. Which of the following is the BEST first step to resolve the issue?

A user's Android smartphone is experiencing intermittent touchscreen unresponsiveness, especially in the bottom corners. The screen has no visible cracks or damage. Which of the following troubleshooting steps should the technician perform FIRST?

A user reports that their mobile phone's battery drains significantly faster than normal. The technician checks the battery usage statistics and finds that a specific social media app is consuming an unusually high percentage of battery. Which of the following is the FIRST step the technician should take to resolve the issue?

After a user updates their iPhone to the latest iOS version, the device can no longer connect to the cellular network. The SIM card is recognized, Wi-Fi works, and the phone can make calls over Wi-Fi (VoWiFi). The technician performed a network settings reset and a full restore from a backup, but the issue persists. Which of the following is the MOST likely cause?

A user reports that their Android smartphone no longer charges when connected to a wall charger. The technician tries a different charging cable and power adapter, but the phone still does not charge. The phone's charging port appears clean and free of debris. The technician then attempts to charge the phone using a wireless charging pad, and the phone charges successfully. Which of the following is the most likely cause of the issue?

A user reports that their iPhone's touchscreen is unresponsive after the device was accidentally dropped in a puddle. The technician dries the phone, performs a forced restart, and cleans the screen, but the touch remains unresponsive. However, the display still shows images correctly. Which component is most likely damaged?

A user's Android tablet was dropped and the glass digitizer cracked, but the LCD display still shows images correctly. The user reports that touch input is unresponsive in several areas of the screen. Which of the following replacement procedures is MOST appropriate?

A user's smartphone (Android) will not charge via the USB-C port. The technician tries a different cable and charger, and also tries cleaning the port with compressed air. The phone still does not charge. However, the phone can be recognized by a computer when connected via USB. Which of the following should the technician try next?

A user reports that their Android smartphone displays 'Emergency calls only' at the top of the screen and cannot make or receive regular calls. The device still connects to Wi-Fi and can use messaging apps over Wi-Fi. The technician removes the SIM card, inspects it for damage, and reinserts it. The problem persists. The technician then takes a known-working SIM card from another phone and inserts it into the user's phone; the phone immediately connects to the cellular network. Which of the following is the MOST likely cause?

A user reports that their Android smartphone's battery drains significantly faster than usual. The technician checks the battery usage statistics and finds that the screen is consuming 60% of the battery. The screen brightness is manually set to maximum. Which of the following is the MOST effective step to reduce battery consumption?

A user reports that their Android smartphone will not charge when placed on a wireless charging pad. The phone charges normally when connected via a USB cable. The technician tests the wireless charging pad with another smartphone, and it works fine. Which of the following is the MOST likely cause of the issue?

A user's iPhone 11 is stuck in a boot loop after an attempted jailbreak. The device repeatedly shows the Apple logo and then restarts. The technician connects the iPhone to a computer; iTunes displays a message that the device is in recovery mode and must be restored. The technician attempts a force restart and tries a different USB cable and computer, but the iPhone remains in recovery mode and enters the boot loop after any restore attempt. Which of the following is the NEXT best step?

A user reports that their iPhone's battery drains quickly throughout the day. The technician checks the Battery settings and sees that the display is the top consumer at 40%. The user mentions the screen is very bright outdoors. Which of the following settings would MOST effectively reduce battery drain in this scenario?

A user reports that during phone calls on their Android smartphone, the caller's voice sounds very low and muffled through the earpiece speaker. The technician has cleaned the speaker grille with a soft brush and the issue persists. The phone otherwise functions normally with media sounds playing at adequate volume. Which of the following should the technician check NEXT?

An iPhone 12 charges slowly when connected to a laptop's USB 3.0 port, but charges normally when using the original wall adapter and cable. The technician has already tested the cable with the wall adapter and it works correctly. Which of the following is the MOST likely cause of the slow charging?

A user reports that their Android smartphone can send and receive text messages (SMS) and browse the internet using the cellular data connection, but cannot send picture messages (MMS) to contacts. Which of the following should the technician check FIRST?

A technician needs to replace a cracked LCD screen on an Android smartphone. After disassembling the phone and disconnecting the old screen, which of the following should the technician do FIRST before installing the new screen?

A user reports that their Android smartphone charges very slowly when connected to a laptop's USB-C port that supports Power Delivery. The same cable and charger charge the phone quickly when plugged into a wall outlet. The cable is known to be in good condition. Which of the following is the MOST likely cause of the slow charging?

A user reports that their Android smartphone's touchscreen is unresponsive in a narrow vertical strip near the left edge of the display. The rest of the screen responds normally to touch. The phone has not been dropped or exposed to moisture, and it functions otherwise normally. Which of the following is the MOST likely cause of this issue?

A user reports that their Android smartphone's GPS location often jumps around and shows incorrect positions, especially when indoors. The user has already calibrated the compass and enabled high-accuracy mode. The technician notices the phone has a rugged case with a magnetic kickstand. Which of the following is the MOST likely cause of the GPS inaccuracy?

A user dropped their Android smartphone and now the touchscreen is unresponsive in a small area near the top of the display. The screen is not cracked, and the LCD portion of the display still shows images correctly. Which component is MOST likely damaged?

A user reports that their iPhone's battery drains quickly while the phone is idle. The technician checks the Battery settings and sees that the 'Find My' app is using significant background activity. Which of the following is the MOST effective way to reduce battery drain from this app?

A user reports that their iPhone 13 frequently shuts down unexpectedly when the battery indicator shows between 15% and 20% charge. The phone displays the low battery warning and then powers off. The user has already force-restarted the device and checked for iOS updates. The battery health reading in Settings shows 79% maximum capacity. Which of the following is the MOST likely cause of this issue?

A user reports that their iPhone's battery drains much faster than normal, especially when the phone is idle. The technician checks the Battery settings and sees that the 'Find My' app is using significant background activity. Which of the following is the MOST effective step to reduce battery drain caused by this app?

A user reports that their Android smartphone's battery drains very quickly. The technician checks the battery stats and sees that the screen brightness is set to maximum and the battery health is reported as 'Good'. Which of the following settings should the technician suggest to MOST improve battery life?

A user reports that their iPhone does not charge when connected to a USB port on their laptop, but it charges normally when using the included wall charger. The cable is known to be functional. Which of the following is the MOST likely cause of the issue?

A user's Android phone has a cracked screen, but the touch functionality still works. The user wants to prevent glass fragments from falling out and to protect their fingers until the phone can be repaired. Which of the following is the BEST immediate action?

A user's Android phone screen is cracked but still works. The user wants to continue using the phone temporarily without risk of glass cuts or further damage. What is the BEST immediate solution?

A user reports that their iPhone charges very slowly when connected to a USB port on their laptop, but charges normally using the included wall adapter. The cable is known to be functional. Which of the following is the MOST likely cause?

A user's Android phone connects to the office Wi-Fi network and shows 'Connected' with full signal strength, but the user cannot load any websites. Other devices on the same network can access the internet without issues. The technician checks the phone's network settings and sees an IP address of 192.168.1.115 and a gateway of 192.168.1.1. The phone can successfully ping the gateway. Which of the following should the technician check NEXT?

A user's iPhone is not receiving any sounds from calls or notifications. The volume is turned up, and the silent switch is not enabled. The technician checks the Settings > Sounds & Haptics and sees that all alert volumes are at maximum. The user also reports that calls go directly to voicemail sometimes. Which of the following is the MOST likely cause?

A user's iPhone is connected to Wi-Fi and has an active cellular data plan. The user can send and receive regular SMS text messages, but cannot send iMessages. The recipient's device supports iMessage and other users can message that recipient without issues. The technician has already confirmed that the user's Apple ID is signed in correctly. Which of the following should the technician check NEXT?

A user reports that their iPhone displays 'No SIM' even though the SIM card is properly inserted. The technician has already removed and reinserted the SIM, and performed a restart. Which of the following should the technician do NEXT to isolate the issue?

A user wants to pair a Bluetooth keyboard with their iPad. The keyboard is in pairing mode and has fresh batteries. The iPad's Bluetooth is turned on. The keyboard does not appear in the list of discovered devices. Which of the following should the user try FIRST?

A user reports that their Android smartphone's battery drains very quickly even when the phone is not being used. The technician checks the battery usage statistics and sees that the screen is consuming a high percentage of power, but the screen is off during most of the idle time. Which of the following is the MOST likely cause of this issue?

A user reports that their Android smartphone is getting very hot while charging and the battery drains rapidly even when idle. The charger and cable are known to be functional. The technician opens the device and notices the battery is slightly bulging. Which of the following is the MOST likely cause of the symptoms?

A user reports that their iPhone is not receiving email push notifications from the company's Exchange server. The email account is configured correctly, and the user can manually check email by opening the Mail app. Other users on the same Exchange server receive push notifications without issues. The technician checks the iPhone's Settings > Mail and sees 'Push' is enabled. Which of the following should the technician check NEXT?

A user reports that their Android smartphone will not charge when connected to a USB-C cable. The user has tried multiple chargers and cables, all of which work fine with other devices. The phone's battery is nearly empty. The technician inspects the phone's USB-C port and sees no visible damage. Which of the following should the technician do FIRST?

A user reports that their iPhone will not connect to a Bluetooth speaker that is in pairing mode. The speaker is visible to other smartphones in the area. The technician has already restarted the iPhone and ensured Bluetooth is enabled. Which of the following should the technician do NEXT?

A user reports that their iPhone 12 will not vibrate when receiving incoming calls or text messages. The user has already checked the physical side switch (silent/ringer) and ensured it is not set to silent. The ringer volume is turned up. Which of the following should the user check NEXT to resolve the issue?

A user reports that their Android smartphone's screen does not rotate when the device is turned sideways. The auto-rotate setting is enabled. Which of the following is the MOST likely cause?

A user reports that their iPhone 13 will not connect to the office Wi-Fi network. The user can see the network in the Wi-Fi list, but after entering the correct password, the phone displays 'Unable to join the network.' Other devices can connect to the same Wi-Fi network without issues. The technician has already restarted the iPhone and performed a 'Forget This Network' and rejoined. Which of the following should the technician try NEXT?

A user reports that their Android smartphone will not send picture messages (MMS). Text messages (SMS) send and receive normally. The user has mobile data enabled and is within a strong signal area. Which of the following should the technician check FIRST?

A user reports that their iPhone 12 is not receiving incoming phone calls. When someone calls, the call goes directly to voicemail after one ring. The phone shows full signal strength, and Do Not Disturb (DND) is confirmed to be off. The user can make outgoing calls and send/receive text messages. Which of the following should the technician check NEXT to resolve the issue?

A user reports that their Android smartphone's touchscreen is unresponsive in a narrow vertical strip on the left side of the screen. The rest of the screen works normally. The user has removed the screen protector and cleaned the screen, but the issue persists. There is no visible damage, cracks, or discoloration. Which of the following is the MOST likely cause?

A user reports that their iPhone 14 Pro will not connect to a corporate Wi-Fi network that uses WPA2-Enterprise with 802.1X authentication. The user can see the network in the Wi-Fi list and selects it, but after entering their username and password, the connection fails with a generic 'Unable to join the network' error. Other iOS devices in the office connect to the same network without issues. The technician has already restarted the iPhone, forgotten the network, and re-entered the credentials. Which of the following should the technician try NEXT?

A user reports that their Android smartphone cannot complete contactless payments at NFC terminals. The user has NFC enabled in settings and has tried multiple payment terminals. Other smartphones work at the same terminals. The phone’s screen and case are in good condition with no visible damage. Which of the following should the technician advise the user to check FIRST?

A user reports that their iPhone cannot send iMessages to another iPhone user. Text messages (SMS) to the same contact work normally. The user has a strong cellular data connection and iMessage is enabled in Settings. Which of the following should the technician check FIRST to resolve the issue?

A user reports that their Android smartphone's battery drains very quickly since a recent app update. The phone is running the latest OS version. The user closes all apps from the app switcher, but the battery continues to drain. Which of the following should the technician advise the user to check FIRST?

A user reports that their iPhone 12 is not receiving incoming phone calls from unknown numbers. When an unknown number calls, it goes straight to voicemail after one ring. Known contacts in the user's address book ring normally. The user confirms Do Not Disturb is off. Which of the following is the MOST likely cause?

A user reports that their Android smartphone is not recognized by a Windows 10 computer when connected via USB. The user wants to transfer photos from the phone to the computer. The phone charges when connected. The technician checks the computer's Device Manager and sees an unknown device with a yellow exclamation mark. The user has already tried different USB cables and ports. Which of the following is the MOST likely cause?

A user reports that their Android smartphone's battery drains significantly faster after a recent app update. The phone has the latest OS updates installed. The user has already restarted the phone and closed all running apps. Which of the following should the technician advise the user to check FIRST?

A user reports that their Android smartphone will not connect to a Bluetooth headset that was previously paired. The user has tried turning Bluetooth off and on, and restarting the phone. The headset works with other devices. Which of the following should the technician advise the user to try NEXT?

A user reports that their Android smartphone can send and receive SMS messages and browse the internet using mobile data, but cannot send or receive MMS (picture messages). The technician has confirmed that mobile data is enabled and the signal is strong. Which of the following should the technician check FIRST?

A technician is repairing a smartphone with a cracked digitizer but a functional LCD. The technician needs to safely separate the digitizer from the LCD without causing further damage. Which tool is most appropriate for this task?

A technician needs to remove a swollen lithium-ion battery from a laptop before performing further repairs. Which of the following is the most critical safety step to take before beginning the removal?

A technician replaces a smartphone's fused screen assembly (LCD + digitizer + glass). After reassembly, the phone powers on and the display shows correctly, but the touchscreen is completely unresponsive. Which of the following is the most likely cause?

A user reports that their smartphone's battery drains significantly faster than usual, and the device feels warm to the touch even when it is not being actively used. The battery is not swollen. Which of the following is the MOST likely cause of these symptoms?

A user reports that their smartphone's battery drains significantly faster than usual, and the device feels warm to the touch even when idle. The battery is not swollen. Which of the following should the technician do FIRST to diagnose the issue?

A technician is setting up a new smartphone for a user. The user wants to be able to unlock the phone using their face. Which of the following biometric authentication methods should the technician configure?

A user reports that their smartphone will not charge when connected to a known-good charger and cable. The technician examines the charging port and sees debris inside. Which of the following tools should the technician use to safely remove the debris?

A user dropped their smartphone and now the touchscreen is completely unresponsive, although the display appears normal and the phone powers on and receives calls. Which of the following components is most likely damaged?

A user reports that their smartphone cannot detect any Bluetooth devices. The technician has verified that Bluetooth is enabled in the settings, and the other Bluetooth devices are powered on and in discoverable mode. Which of the following should the technician check next?

A user reports that their smartphone's touchscreen is unresponsive along the left edge but works fine elsewhere. The technician has already performed a soft reset and checked for screen protectors or debris. Which of the following is the most likely cause?

A user's smartphone battery is bulging and the back cover is popping off. Which of the following should the user do FIRST?

A user's iPhone is not receiving any cellular signal. The technician confirms that Airplane Mode is off, the device is not in a low-signal area, and the SIM card is properly inserted and not damaged. Which of the following should the technician try FIRST?

A user reports that their smartphone will not charge. A technician inspects the charging port and notices debris inside the port. Which of the following tools should the technician use to safely clean the debris?

A user's smartphone has a cracked screen but the display and touch still function. The user wants to transfer all data, including contacts, photos, and app settings, to a new phone of the same brand. Which method would be MOST efficient and complete?

A user reports that their smartphone's screen remains dark when they press the power button, but they can hear incoming calls and notifications. The phone is fully charged. Which of the following is the most likely cause?

A user's smartphone has a cracked screen that is still partially functional, but the touch input does not work in the cracked area. The user wants to back up all data before taking it for repair. Which method would be MOST reliable to back up the data if the screen is unresponsive?

A user's smartphone will not charge when connected to the charger. The technician has verified that the charger and cable work with another phone, and the charging port appears clean and free of debris. Which of the following should the technician try FIRST?

A user reports that their smartphone's touchscreen is unresponsive in a small area near the bottom-left corner after dropping the device. The screen is not cracked, and the display still shows images correctly in that area. The technician has already performed a soft reset and verified that no screen protector is interfering. Which of the following is the most likely cause?

A user's smartphone has become intermittent: the screen flickers and sometimes goes completely black for a few seconds before returning to normal. The phone has not been dropped recently and there is no visible damage. The technician has already performed a soft reset and the issue persists. Which of the following is the most likely cause?

A user's smartphone with a removable battery begins to randomly shut down and restart. The technician notices that the battery percentage jumps erratically. Which of the following is the most likely cause?

A user's smartphone has a cracked screen that is still displaying images, but the touch input is completely unresponsive. The user needs to back up all data (contacts, photos, app data) before sending the phone for repair. Which method is the MOST reliable and complete way to back up the data in this situation?

A user reports that their smartphone is running very slowly and the battery drains significantly faster than usual, even when the screen is off. The technician notices that the phone feels warm to the touch. Which of the following is the MOST likely cause of these symptoms?

A user's Android smartphone will not charge when plugged into the wall charger. The technician has already verified the charger and cable work with another phone, cleaned the charging port with compressed air, and performed a soft reset. Which of the following should the technician try NEXT?

A user reports that their smartphone is not vibrating when receiving calls or notifications, even though the vibrate settings are enabled in the sound menu. The ringtone and speaker work normally. Which of the following is the MOST likely cause of this issue?

A user reports that their smartphone has distorted sound coming from the earpiece speaker during phone calls, but the loudspeaker and headphone jack work normally. The user has already tried turning up the volume and cleaning the earpiece grille. Which of the following is the MOST likely cause?

A user's smartphone was accidentally dropped into a puddle of water. The user immediately removed the phone from the water and wiped it dry. They are now attempting to power it on, but the phone does not respond. Which of the following should the user do FIRST to maximize the chance of recovery?

A user's smartphone has a cracked screen. The display still shows images, but the touch input is completely unresponsive. The user needs to back up all data (contacts, photos, app data) before sending the phone for repair. The phone is not rooted, and no prior backup software was configured. Which of the following methods is the MOST reliable and complete way to back up the data in this situation?

A user accidentally spills coffee over their smartphone. They immediately pick it up and wipe the exterior. The phone is still powered on and functioning, but the touchscreen is not responding correctly in the area where the liquid was spilled. Which of the following should the user do FIRST to prevent further damage?

A user's laptop powers on (fans spin, power LED on), but the built-in display remains black. The technician connects an external monitor to the laptop's video port, and the external monitor displays the desktop correctly. Which of the following is the MOST likely cause?

A user accidentally drops their smartphone into a saltwater pool. They retrieve it within seconds and wipe the exterior dry. The phone is still powered on, but the screen is flickering and the touchscreen is unresponsive. Which of the following should the user do FIRST to maximize the chance of successful recovery?

A user's smartphone has a cracked screen. The display is still visible, but the touch input is only partially responsive. The user needs to perform a factory reset to erase personal data before selling the device. The user can see the 'Reset' button on the screen but cannot tap it due to the unresponsive area. Which of the following methods would be the MOST effective way to perform the factory reset?

A user dropped their smartphone and the touchscreen is now completely unresponsive. The display shows the home screen normally, the device powers on, and physical buttons (power, volume) work. The user has already performed a forced restart (holding power and volume down) but the touchscreen remains unresponsive. The device is not backed up, and the user needs to recover data before sending it for repair. Which of the following is the NEXT best step?

A user reports that their smartphone does not vibrate even though the vibrate mode is enabled in settings. The phone was accidentally dropped onto a hard floor two days ago. The screen is not cracked, and the phone still rings and displays notifications. The user has already tried restarting the phone and toggling the vibrate setting. Which of the following is the MOST likely cause?

A user reports that their smartphone (Android) turns off without warning when the battery indicator shows 15-20% remaining. The phone will not power back on until it is connected to a charger, at which point it shows a much lower battery percentage (e.g., 2%). The user has already performed a battery calibration procedure (draining fully and charging to 100% uninterrupted) but the problem persists. Which of the following is the MOST likely cause?

A user's Android tablet is running low on internal storage. A microSD card has been inserted and formatted as portable storage. The user wants to move some applications to the microSD card to free up space, but the 'Move to SD card' option is grayed out for many apps. Which of the following is the MOST likely reason for this?

A user reports that their iPhone does not charge when plugged into the USB port of a Windows laptop, but it charges normally with the included wall adapter. The laptop recognizes other USB devices such as a mouse and a flash drive. Which of the following is the MOST likely cause of the issue?

A user's Android smartphone exhibits a strange charging behavior. When the phone is powered off and connected to the wall charger, it charges normally and the battery percentage increases. However, when the phone is powered on and plugged into the same charger, the device shows the charging icon, but the battery percentage steadily decreases over time, eventually causing the phone to shut down. The user has already tried different charging cables and adapters, and has performed a factory reset. Which component is MOST likely faulty?

A user's Android smartphone charges normally when powered off and connected to a wall charger. However, when the phone is powered on and connected to the same charger, the battery percentage decreases over time despite showing the charging icon, eventually causing the phone to shut down. The user has tried multiple charging cables and adapters, performed a factory reset, and the issue persists. Which of the following is the MOST likely cause?

A user has an old iPhone with a cracked screen that is still fully functional and responsive. The user wants to transfer all data, settings, and apps to a brand new iPhone as quickly and easily as possible without using a computer or internet backup. Both iPhones are running the latest iOS version and are placed close together. Which of the following methods should the user choose?

A user reports that their Android smartphone's battery drains much faster than usual after a recent system update. The phone is two years old and has been working normally until now. The user has already restarted the device. Which of the following should the technician recommend FIRST?

A user reports that their Android smartphone's battery drains very quickly after a recent app update. The user has already checked battery usage statistics and found that no app is using an unusually high amount of power. The phone is less than a year old. Which of the following should the technician recommend FIRST?

A user reports that their Android smartphone's touchscreen is unresponsive. The user performed a factory reset, but the problem persists. The technician notices that the screen has several deep scratches but no cracks. Which of the following is the MOST likely cause?

A user reports that their Bluetooth headphones no longer connect to their smartphone after an operating system update. The headphones work normally when paired with a different smartphone. Other Bluetooth devices, such as a smartwatch, still connect to the user's phone without issues. Which of the following should the user try FIRST?

A user notices that the back cover of their Android smartphone is slightly bulging and the screen is lifting from the frame. The phone still turns on and functions normally. Which of the following actions should the technician recommend FIRST?

A user reports that their Android smartphone can make and receive phone calls, but cannot send or receive text messages (SMS/MMS) after a recent operating system update. The user has verified that the mobile data connection is working, and the messaging app is not blocked. Which of the following is the MOST likely cause of this issue?

A user reports that their Android smartphone's screen is shattered and the lower half of the touchscreen is unresponsive. The phone is locked with a PIN, and the user urgently needs to retrieve photos from the internal storage. The user does not want to spend money on repairs if possible. Which of the following is the BEST method to retrieve the data?

A technician is replacing a cracked screen on an Android smartphone. After reassembling the device, the phone powers on successfully and the display shows the lock screen with the correct time and background image. However, the touchscreen does not respond to any taps or swipes. The technician has verified that the replacement screen is compatible with the phone model. Which of the following should the technician check FIRST?

A user reports that their Android smartphone's volume rocker button is physically stuck in the pressed position. The phone is still functioning, but the volume constantly decreases to zero and cannot be adjusted. Which of the following is the BEST first step?

A user's iPhone is stuck on the Apple logo during startup and will not complete the boot process. The user has already performed a force restart (press and release Volume Up, then Volume Down, then hold the Side button) multiple times without success. Which of the following should the user do NEXT to resolve this issue?

A user reports that their smartphone, which uses a Lightning connector, will not charge at all. The phone powered off overnight and will not turn back on. The user has tried three different known-good charging cables and two known-good wall adapters, none of which work. The technician inspects the phone's charging port and notices it appears clean and undamaged. Which of the following is the MOST likely cause of the issue?

A user's iPhone 13 will not power on after being plugged in overnight with a Lightning cable. The technician tries a different cable and power adapter with no success. The technician inspects the Lightning port and removes a small amount of debris, but the phone remains unresponsive. When the technician places the phone on a Qi wireless charger, the screen briefly displays a battery icon and then goes black. Which of the following is the MOST likely cause of the issue?

A user reports that their iPhone charges very slowly and only when the Lightning cable is held at a specific angle. The user has tried multiple known-good chargers and cables, but the issue persists. The technician inspects the Lightning port on the phone and sees what appears to be lint compacted at the bottom. Which of the following is the BEST next step for the technician to resolve this issue?

A user reports that their iPhone 12 is stuck in a continuous boot loop—it shows the Apple logo, then turns off, and repeats. The user has already performed a force restart (Volume Up, Volume Down, hold Side button) multiple times without success. The iPhone is still running the original iOS version. Which of the following should the user try next to resolve this issue?

A user reports that their Android smartphone charges very slowly and only when the charging cable is held at a specific angle. The technician inspects the charging port and it appears clean with no visible debris. Which of the following is the BEST first step to resolve this issue?

A user reports that their Android smartphone can see the corporate Wi-Fi network (SSID: CorpNet) but fails to connect, displaying 'Authentication error'. Other devices on the same network connect successfully. The technician has confirmed the Wi-Fi password is correct and the device is not using a static IP. Which of the following is the BEST first troubleshooting step?

A user reports that their iPhone 13 does not charge when plugged into the wall outlet using the original charging cable and adapter. The technician tries a different known-good Lightning cable and wall adapter, but the phone still does not charge. The technician inspects the Lightning port on the phone and sees that the port opening appears clean with no visible debris. Which of the following is the BEST next step to troubleshoot this issue?

A user reports that their Android smartphone's battery drains much faster than normal, even when the phone is idle. The technician checks the battery usage statistics and sees that 'Android System' and 'Google Play Services' are the top consumers. The user has already restarted the phone. Which of the following should the technician do NEXT to resolve the issue?

A user's smartphone has a cracked screen. The touch display still works partially, but there are areas where touch is unresponsive. The phone's LCD is intact, with no dead pixels or discoloration. Which component most likely needs to be replaced?

A technician replaces the glass/digitizer assembly on an iPhone 12. After reassembling the phone, it powers on and the display works, but the touch input is completely unresponsive. The technician has already reseated the screen connectors. Which of the following is the MOST likely cause of the touch failure?

A user reports that their Android smartphone's screen remains black during phone calls, even when the phone is held away from the ear. The screen works normally at all other times. The technician has already cleaned the top of the phone where the sensors are located and verified that the screen protector is not obstructing anything. Which of the following components is MOST likely causing the issue?

A user reports that their Android smartphone's screen does not rotate when the phone is turned sideways. The auto-rotate setting is enabled. The technician has already verified that the phone's operating system and apps are up to date. Which of the following is the MOST likely cause of this issue?

A user reports that their Android smartphone's GPS is not working accurately. The technician has confirmed that Location settings are set to High accuracy mode. Which of the following is the BEST next step to resolve this issue?

A user reports that their Android tablet's Wi-Fi connection frequently drops and reconnects. Other devices on the same network are stable. The technician has already forgotten the Wi-Fi network, rebooted the tablet, and confirmed the network password is correct. Which of the following is the BEST next step?

A user reports that their iPhone will not charge when plugged into a charger. The technician examines the Lightning port and notices that there is visible debris inside the port. The technician has tried different charging cables and power adapters, all of which work with other iPhones. Which of the following is the BEST next step to resolve the issue?

A user reports that their Android smartphone's battery drains very quickly, even when the phone is not in use. The user has already closed all background apps, and the battery statistics show that the 'Screen' is the top consumer at 35%, which seems normal. The technician notices that the phone's back feels warm near the top. Which component is MOST likely faulty?

A user reports that their iPhone is not recognized by a Windows computer when connected via USB. The user has tried three different USB cables, all of which allow the phone to charge normally. The user also tested another iPhone with the same computer and it was recognized. The iPhone's 'Trust This Computer' prompt appeared and was accepted. Which of the following is the MOST likely cause of the issue?

A user reports that their Android smartphone's screen is cracked in the lower-left corner. The touch input in that area is unresponsive, but the display works correctly and the rest of the touchscreen functions normally. Which of the following is the BEST repair option?

A user reports that their Android smartphone's battery drains very quickly during normal use and the phone feels unusually warm, especially near the back panel. The technician has already tested the charging cable and power adapter with another device and they work correctly. Which of the following components is MOST likely faulty?

A user's iPhone 12 is not making any sound during calls or notifications, but the ringer switch is not set to silent. The volume is turned up. The technician has already performed a force restart and updated iOS. Which of the following is the most likely cause?

A technician is replacing the battery in an Android smartphone. Which of the following is the MOST important step to prevent damage to the SIM card during the repair?

A user reports that their iPhone screen is cracked in the bottom-left corner. The display works correctly, but the touch input in the cracked area is unresponsive. The rest of the touchscreen functions normally. Which of the following is the BEST repair option?

A user brings in an iPhone that will not turn on. The technician has verified that the charging cable and power adapter work correctly by testing them with another iPhone. The technician attempts a force restart by pressing and holding the Side and Volume Down buttons, but the device remains unresponsive. Which of the following is the MOST likely cause of the issue?

A user reports that their Android smartphone will not charge. The technician tries a different charging cable and wall adapter, but the phone still does not charge. The USB port on the phone appears clean and free of debris. Which of the following components is MOST likely faulty and should be replaced?

A user's iPhone 12 has no sound from the speaker during phone calls, but the earpiece works normally. The user has confirmed that the volume is turned up and the silent switch is not enabled. The technician has performed a restart and updated iOS to the latest version. Which of the following is the MOST likely cause of the issue?

A user reports that their Android smartphone's battery drains very quickly, even when the phone is idle. The phone also feels unusually warm near the back cover. The technician has already checked that no apps are running abnormally in the background and the screen brightness is set to auto. Which component is MOST likely faulty?

A user reports that their laptop's battery indicator shows 'plugged in, not charging.' The technician tests the AC adapter with a multimeter and verifies it outputs the correct voltage. The laptop is a standard model with a removable battery. Which of the following components is MOST likely faulty?

A technician replaced the cracked screen on an iPhone 11. After reassembling the device, the phone powers on and responds to touch, but the display remains black. The technician hears the camera shutter sound when tapping the camera icon. Which of the following is the MOST likely cause?

A user reports that their Android smartphone displays 'No SIM card - Emergency calls only' even though the SIM is properly inserted. The technician removes the SIM and inserts it into another compatible phone, where it works perfectly. The technician then inserts a known-working SIM from another phone into the original device, which still shows 'No SIM card.' Which of the following is the MOST likely cause?

A user reports that their smartphone's screen appears to be slightly bulging outward and the back cover is separating from the chassis. The phone still powers on and functions normally. Which of the following components is MOST likely causing this issue?

A user dropped their iPhone, and now the screen displays vertical lines and the touch input is unresponsive in the affected area. The display still shows images and colors correctly in the unaffected areas. Which component is MOST likely damaged?

A user reports that their smartphone will not charge when plugged into a wall outlet, even though the charging cable appears undamaged and the outlet works with other devices. Which of the following is the MOST likely cause of this issue?

A user reports that their smartphone will not charge when connected to a USB port on their laptop, but it charges fine when plugged into a wall charger. The laptop's other USB ports work with a mouse and keyboard. Which of the following is the MOST likely cause?

A user reports that their smartphone Wi-Fi connection at home frequently drops when they move from one room to another. The home has a single wireless router located in the basement. Which of the following is the MOST likely cause of the intermittent connection?

A technician is repairing a smartphone that has a cracked screen. The glass is shattered but the LCD and digitizer underneath are functional except for unresponsive touch in some areas. The user wants all data preserved. After disconnecting the battery, which tool is MOST critical for safely lifting the cracked glass to access the internal components?

A user wants to connect their smartphone to an external monitor for a presentation. The monitor only has a VGA input, and the smartphone has a USB-C port that supports DisplayPort Alt Mode. Which cable or adapter should the user obtain to connect the devices?

A user's smartphone is connected to a Wi-Fi network but cannot send or receive email. The user can browse the internet using the web browser. Which of the following is the MOST likely cause?

A technician is replacing the battery in a smartphone. After reassembly, the phone powers on and the screen works, but the battery icon shows 0% charge and the phone does not recognize the battery. The technician verifies that the battery connector is fully seated. Which of the following should the technician check NEXT?

A user reports that their smartphone will not power on. When they plug it into a charger, the LED indicator flashes red but the screen remains black. The phone was working normally earlier in the day and was not dropped or exposed to water. Which of the following is the MOST likely cause?

A user reports that their smartphone's battery drains very quickly and the phone feels hot to the touch, even when the phone is idle. The phone is running the latest version of its operating system. Which of the following is the MOST likely cause?

A user reports that their smartphone's GPS location is inaccurate, often showing the wrong street or city. The user states that mapping applications open and the phone is able to see satellites, but the blue location dot is far from the actual position. The phone is running the latest operating system version. Which of the following should a technician check FIRST?

A user's smartphone will not charge when plugged into a cable. The technician inspects the charging port and finds it is clean and the cable appears undamaged. The phone was working normally earlier and was not dropped. The technician tests the cable with another device and it charges normally. Which of the following should the technician do NEXT to diagnose the issue?

A technician sets up a smartphone for a user who wants to connect a Bluetooth keyboard and mouse. After pairing both devices, the user reports that typing on the keyboard produces random characters or repeated letters. The technician verifies that both devices are paired and show good battery levels. Which of the following is the MOST likely cause of this issue?

A technician replaced the screen assembly on a smartphone. After reassembly, the phone powers on and displays correctly, but the touch screen is unresponsive. Which of the following should the technician check FIRST?

A user's smartphone screen is cracked and the touch is unresponsive in the cracked area. The technician replaces the screen assembly. After reassembly, the phone powers on, displays correctly, but the touch still does not work in the same area. What should the technician check first?

A user reports that their smartphone's Bluetooth will not enable. When the user taps the Bluetooth toggle in the Quick Settings panel, it briefly turns blue and then immediately turns gray. The phone did not get wet and was not dropped recently. Which of the following should the technician check FIRST?

A technician replaces the digitizer on a smartphone that had a cracked screen and an unresponsive touch area. After reassembly, the touch screen still does not respond in the area where the crack was. The technician has already verified that all flex cable connections to the digitizer are secure. Which of the following should the technician do NEXT?

A user reports that their smartphone’s battery drains very quickly, even when not actively in use. The technician notes that the device feels warm to the touch, the screen brightness is set to maximum, and several apps are running in the background. The device is running the latest OS version. Which of the following should the technician recommend as the FIRST step to address the battery drain?

A user reports that their smartphone battery percentage jumps erratically—for example, showing 50% then suddenly dropping to 10% and shutting down. The technician verifies the battery is not swollen, the charging port is clean, and the device charges normally. Which of the following should the technician try NEXT?

A user wants to synchronize their smartphone's contacts and calendar with their company's Microsoft Exchange server. Which protocol is specifically designed to provide this synchronization?

A user reports that their smartphone's touch screen stopped working after the phone was briefly submerged in water. The technician dried the device thoroughly, then replaced the screen assembly (including the digitizer) with a known-good part. After reassembly, the touch screen is still completely unresponsive. The display works correctly, and the phone powers on and charges normally. Which of the following components should the technician check next?

A user reports that their smartphone's battery life has significantly decreased after a recent OS update. The technician observes that location services and background app refresh are enabled. Which of the following should the technician do FIRST to address the issue?

A user's smartphone is unable to make or receive calls. The device shows full signal bars but when attempting to place a call, it immediately ends. The technician checks airplane mode and it is off. Which of the following should the technician check FIRST?

A technician is repairing a smartphone with a cracked screen. After replacing the screen assembly, the touch screen is completely unresponsive, although the display shows properly. The technician has verified that the digitizer flex cable is firmly seated in the connector on the motherboard. Which of the following should the technician check NEXT?

A user reports that their smartphone's Bluetooth will not pair with their car's hands-free system after a recent OS update. The car's system has been successfully paired with other phones. The technician has reset the phone's network settings and forgotten the car from the Bluetooth list, but the pairing still fails. Which of the following should the technician try NEXT?

A technician replaced the cracked display on a smartphone. After reassembly, the touchscreen works perfectly, but the physical home button (which also houses the fingerprint sensor) does not respond to presses. The display and touch functionality are normal. Which of the following components is MOST likely the cause of this issue?

A user reports that their smartphone's camera app crashes whenever they attempt to take a photo with the flash enabled. The camera works normally without flash, and the flashlight app functions correctly. Which of the following components is MOST likely faulty?

A user reports that their smartphone charges intermittently. The technician observes that the USB-C cable fits very loosely into the charging port and often falls out. Which component is MOST likely causing this issue?

A user reports that their smartphone's battery drains significantly faster than normal and the device feels very hot to the touch, especially during charging. The phone is using a third-party charger and USB cable purchased from a discount store. Which of the following is the BEST first step the technician should recommend?

A user reports that their smartphone will charge wirelessly on a charging pad but will not charge when connected to a USB-C cable. The cable and charger have been tested on another phone and work normally. The technician has already performed a forced restart and cleaned the charging port with compressed air. Which component should the technician replace FIRST?

A technician replaced the cracked glass and LCD assembly on a smartphone. The touch screen now works intermittently and often registers touches in the wrong location or not at all. The display itself is clear and bright. Which of the following is the MOST likely cause?

A user reports that their smartphone will charge wirelessly on a charging pad but will not charge when connected to a USB-C cable. The USB-C cable and charger work normally when tested on another phone. The technician has already performed a forced restart and cleaned the charging port with compressed air. Which component should the technician replace FIRST?

A user reports that their smartphone's touch screen is unresponsive. The technician observes that the screen is cracked and has visible black spots. The phone still powers on and the physical buttons work. Which of the following components is MOST likely faulty?

A user reports that during phone calls, the person on the other end cannot hear them. The user can hear the caller clearly. The user can also record voice memos and videos with sound without any issues. Which of the following components is MOST likely faulty?

A user reports that their smartphone's screen does not turn off during phone calls when held to the ear, causing unintended button presses. The screen works normally at all other times. The technician has verified the device's operating system and apps are up to date. Which of the following is the MOST likely cause of this issue?

A user reports that the camera on their smartphone takes pictures but all images are completely black, even in well-lit conditions. The camera app does not show any error messages. The flash works, and the front camera functions normally. Which component is MOST likely faulty?

A user reports that their smartphone's Bluetooth has stopped working entirely—it cannot discover any devices and cannot be discovered by other devices. However, Wi-Fi connectivity remains unaffected. The technician has already performed a full network settings reset and tested the device in safe mode. Which of the following hardware components is MOST likely faulty?

A user reports that their smartphone's GPS is not working accurately; location is often off by several blocks. The user has tried rebooting and updating the maps app. The technician notices that the phone's date and time are incorrect, even after setting to automatic. Which component is MOST likely faulty?

A user reports that their smartphone's battery drains very quickly even when the phone is idle. The technician checks battery health in settings and it shows 'Normal.' No single app reports excessive power consumption. The phone also feels warm to the touch while not in use. Which of the following is the MOST likely cause?

A user reports that their smartphone's earpiece speaker is extremely quiet during phone calls. The loudspeaker and Bluetooth audio work perfectly. The technician has already increased the in-call volume to maximum. Which of the following components is MOST likely faulty?

A user reports that their smartphone's GPS is often inaccurate (location is off by several blocks) and the camera app crashes when switching to video mode. The phone has no physical damage and has not been dropped recently. The technician performs a factory reset, but the problems persist. Which of the following components is MOST likely faulty?

A user drops their smartphone onto a concrete floor. After the fall, the screen displays images and colors correctly, but the touch input does not respond at all. The user has rebooted the phone and wiped the screen clean. Which of the following hardware components is MOST likely damaged?

A user reports that the touchscreen on their smartphone is unresponsive in a vertical strip approximately one inch wide, running from the top to the bottom of the screen. All other areas of the screen respond correctly to touch. The user has cleaned the screen and removed the screen protector. The phone has not been dropped or exposed to liquid. Which of the following components is MOST likely causing this issue?

A user reports that their Android smartphone's battery drains extremely quickly, and the phone frequently feels warm even when not in use. The technician checks the battery health and it shows 'Good'. The technician notices that the phone's GPS icon appears intermittently in the status bar even when location services are turned off in the settings. Which of the following is the MOST likely cause?

A user reports that their smartphone's 3.5mm headphone jack is not working. When headphones are inserted, the music continues to play from the built-in speaker, and the headphone icon does not appear in the status bar. The technician has cleaned the jack with compressed air and tested with multiple headphones. Which of the following components is MOST likely faulty?

A technician is setting up a new Android tablet for a user who wants to connect a Bluetooth keyboard. The keyboard is turned on and in pairing mode. The tablet's Bluetooth is enabled, but the keyboard does not appear in the available devices list. Which of the following should the technician check FIRST?

A user reports that their smartphone's GPS cannot get a lock, and the compass app shows a wrong direction. The phone recently had its screen replaced by a third-party repair shop. Which of the following is the MOST likely cause of these issues?

A user reports that their smartphone will not power on. The technician connects the phone to a charger and sees a red LED indicator for a few seconds, then it goes off. After leaving it charging for an hour, the phone still will not turn on, and the technician notices the phone feels unusually warm near the battery area. Which of the following components is MOST likely faulty?

A user dropped their smartphone onto a tile floor. The screen is not cracked and displays images and colors perfectly, but the touch input is completely unresponsive in all areas. The user has rebooted the phone and cleaned the screen. Which of the following hardware components is MOST likely damaged?

A user reports that their smartphone will not charge. The phone was working normally until the user plugged it into a generic car charger. Now, when connected to any charger, the phone displays the charging icon but the battery percentage does not increase over time. The technician has tested the phone with a known-good wall charger and cable, and the symptom persists. The phone is detected by a computer and can transfer files over USB. Which of the following components is MOST likely faulty?

A user's Android smartphone recently got a swollen battery and feels warm to the touch even when not in use. The technician checks the battery health using the built-in diagnostic tool, which reports 'Good'. The user mentions the phone was dropped onto a hardwood floor a few days ago. Which of the following is the MOST likely cause?

A user drops their smartphone onto a concrete floor. The screen displays images and colors correctly, but the touch input is completely unresponsive in all areas. The user has rebooted the phone and cleaned the screen. Which of the following hardware components is MOST likely damaged?

A user dropped their smartphone onto a tiled floor. The screen now flickers intermittently and there is a visible column of dead pixels on the left side. The touch input continues to work in the unaffected areas. Which of the following components is MOST likely damaged?

A user's Android smartphone was dropped, causing the glass to shatter. The display still shows images correctly, and touch input works in most areas except for a small region near the top-left corner. The user wants to back up all internal data before taking the phone to a repair shop. Which of the following is the BEST method for the technician to back up the device's data immediately?

A user drops their smartphone onto a tile floor. The screen is not cracked and the phone powers on normally. However, the phone can no longer detect any Wi-Fi networks, even though other devices in the same location can. Bluetooth continues to work correctly. Which of the following components is MOST likely damaged?

A user's smartphone screen does not auto-rotate when the device is turned sideways. The technician checks the 'Auto-rotate' setting and finds it is enabled. Which of the following components is MOST likely malfunctioning?

A user reports that their smartphone emits no sound from the bottom speaker (used for speakerphone and media playback). The earpiece works during phone calls, and audio through wired headphones is normal. The volume is turned up and the phone is not in silent mode. The technician has verified that the software audio settings are correct. Which of the following components is MOST likely faulty?

A user drops a tablet onto a hard floor. The display still shows images and colors correctly, but the touchscreen is completely unresponsive in all areas. The technician has rebooted the device and cleaned the screen with a soft cloth. Which of the following components is MOST likely damaged?

A user's Android smartphone is running hot to the touch and the battery drains significantly faster than usual, even when the phone is idle. The technician checks the battery health using a diagnostic app, which reports it as 'Good'. The user has not installed any new apps recently. Which of the following is the MOST likely cause of the issue?

A user reports that a laptop connects to Wi-Fi at home but cannot connect to a corporate docking station's wired network through USB-C. Other peripherals on the dock work. What should the technician check first?