The answer is to update the car’s infotainment system firmware. This is correct because when an Android Bluetooth keeps disconnecting from a car after basic steps like clearing the Bluetooth cache and re-pairing have failed, the root cause is often a bug or incompatibility in the vehicle’s Bluetooth stack rather than the phone itself. On the CompTIA A+ Core 2 220-1202 exam, this scenario tests your understanding of the troubleshooting methodology—specifically, that firmware updates for peripheral devices should be investigated before escalating to hardware replacement or factory resets. A common trap is assuming the phone is always at fault, but the car’s system is frequently the culprit in persistent disconnects. Remember the memory tip: “Car first, phone last”—always check the vehicle’s firmware before wiping the phone.
220-1202 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's Bluetooth keeps disconnecting from their car's hands-free system. The technician has already cleared the Bluetooth cache and re-paired the devices. What should the technician do NEXT?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Update the car's infotainment system firmware.
Option B is correct because after basic troubleshooting (cache clear and re-pair) fails, the next logical step is to check for firmware updates on the car's infotainment system. Bluetooth connectivity issues between a phone and a car are often caused by incompatibilities or bugs in the car's Bluetooth stack, which can be resolved by updating the car's firmware. The technician should prioritize updating the car's system before considering hardware replacement or more drastic phone resets.
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.
✗
Perform a factory reset on the phone.
Why it's wrong here
A factory reset is too drastic and may not resolve a compatibility issue between specific devices.
✓
Update the car's infotainment system firmware.
Why this is correct
Many car manufacturers release firmware updates to fix Bluetooth compatibility issues, making this a targeted solution.
Related concept
Read the scenario before looking for a memorised answer.
✗
Replace the phone's Bluetooth antenna.
Why it's wrong here
Hardware failure is unlikely given the phone works with other devices, and antenna replacement is invasive.
✗
Disable Bluetooth power saving mode on the phone.
Why it's wrong here
Power saving can cause disconnections, but this is less common than a compatibility issue, and the symptom is specific to one device.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume the phone is always at fault and jump to a factory reset (Option A) or hardware replacement (Option C), when in reality the car's infotainment firmware is a frequent source of Bluetooth instability that should be addressed first.
Detailed technical explanation
How to think about this question
Bluetooth hands-free profiles (HFP) and Advanced Audio Distribution Profile (A2DP) rely on consistent pairing and connection parameters. Car infotainment systems often run custom Bluetooth stacks that may have bugs in handling connection timeouts, encryption key exchange, or multi-profile connections. Firmware updates from the car manufacturer can patch these issues, such as fixing incorrect Bluetooth Low Energy (BLE) coexistence or improving HFP reconnection logic, which is a common source of intermittent disconnections.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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: Update the car's infotainment system firmware. — Option B is correct because after basic troubleshooting (cache clear and re-pair) fails, the next logical step is to check for firmware updates on the car's infotainment system. Bluetooth connectivity issues between a phone and a car are often caused by incompatibilities or bugs in the car's Bluetooth stack, which can be resolved by updating the car's firmware. The technician should prioritize updating the car's system before considering hardware replacement or more drastic phone resets.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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