The correct first step is to verify the Wi-Fi password is being entered correctly. This is the most common cause of a single device failing to connect after the network has been forgotten and re-entered, because Android passwords are case-sensitive and a simple typo or Caps Lock oversight will block authentication. Since other devices connect fine, the issue is isolated to the phone, making password verification the quickest, least intrusive step before escalating to router or certificate checks. On the CompTIA A+ Core 2 220-1202 exam, this scenario tests your ability to follow the “most likely first” troubleshooting methodology, avoiding the trap of immediately blaming the corporate network or security settings. A common memory tip is “Password first, panic last”—always confirm the user typed it exactly, including uppercase, lowercase, and special characters, before touching any advanced settings.
220-1102 Mobile OS and App Troubleshooting Practice Question
This 220-1202 practice question tests your understanding of mobile os and app troubleshooting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A user reports that their Android phone will not connect to their corporate Wi-Fi network, but other devices connect fine. They have forgotten the network and re-entered the password, but it still fails. What should you check first?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Check if the router is using MAC address filtering.
Why wrong: While possible, this is less likely if other devices connect fine; it's a more advanced step to check after verifying the password.
B
Verify the Wi-Fi password is being entered correctly.
The most common issue is a typo or case error in the password, especially after forgetting and re-entering the network.
C
Reset the phone's network settings to default.
Why wrong: This is a more drastic step that should be taken only after simpler checks like password verification fail.
D
Update the phone's operating system to the latest version.
Why wrong: While outdated software can cause issues, it is not the first troubleshooting step for a connectivity problem; password is a more immediate check.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Verify the Wi-Fi password is being entered correctly.
Option B is correct because the most common cause of a single device failing to connect after forgetting and re-entering the network is a typo or case-sensitive error in the Wi-Fi password. Since other devices connect fine, the issue is isolated to the phone, and verifying the password is the quickest, least intrusive step before escalating to more complex troubleshooting.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Check if the router is using MAC address filtering.
Why it's wrong here
While possible, this is less likely if other devices connect fine; it's a more advanced step to check after verifying the password.
✓
Verify the Wi-Fi password is being entered correctly.
Why this is correct
The most common issue is a typo or case error in the password, especially after forgetting and re-entering the network.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Reset the phone's network settings to default.
Why it's wrong here
This is a more drastic step that should be taken only after simpler checks like password verification fail.
✗
Update the phone's operating system to the latest version.
Why it's wrong here
While outdated software can cause issues, it is not the first troubleshooting step for a connectivity problem; password is a more immediate check.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the candidate's ability to follow a logical troubleshooting methodology (OSI model layer by layer), and the trap here is that many candidates jump to advanced settings like MAC filtering or network resets instead of starting with the most basic, user-error-prone step of verifying the password.
Detailed technical explanation
How to think about this question
Wi-Fi authentication uses the 4-way handshake defined in IEEE 802.11i, where the client and access point derive a pairwise transient key (PTK) from the pre-shared key (PSK). If the password is even one character off, the PTK will not match, causing the handshake to fail at the EAPOL-Key message 3 or 4 stage, resulting in an authentication timeout. In enterprise networks, this is often compounded by hidden SSIDs or 802.1X configurations, but in a simple PSK scenario, password accuracy is the first variable to eliminate.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1202 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1202 question in full detail.
Mobile OS and App Troubleshooting — This question tests Mobile OS and App Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Verify the Wi-Fi password is being entered correctly. — Option B is correct because the most common cause of a single device failing to connect after forgetting and re-entering the network is a typo or case-sensitive error in the Wi-Fi password. Since other devices connect fine, the issue is isolated to the phone, and verifying the password is the quickest, least intrusive step before escalating to more complex troubleshooting.
What should I do if I get this 220-1202 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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