- A
The headset battery is low.
Why wrong: Low battery might cause intermittent audio, but the headset works with another phone, so battery is not the issue.
- B
The phone is not using the correct Bluetooth profile for calls.
Smartphones can use separate profiles for media (A2DP) and calls (HSP/HFP); if the call profile is not active, no audio is heard.
- C
The headset is out of Bluetooth range.
Why wrong: If out of range, the connection would drop entirely, not just lose audio.
- D
The phone's Bluetooth radio is faulty.
Why wrong: The headset pairs successfully, so the radio is working; the issue is profile-specific.
Question 161 of 1,020
220-1201 Mobile Device Connection Methods Practice Question
This 220-1201 practice question tests your understanding of mobile device connection methods. 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 new Bluetooth headset pairs with their smartphone but no audio is heard during calls. The headset works fine with another phone. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The phone is not using the correct Bluetooth profile for calls.
The most likely cause is that the phone is not using the correct Bluetooth profile for calls. Bluetooth headsets require the Hands-Free Profile (HFP) or Headset Profile (HSP) for bidirectional audio during calls. If the phone defaults to the Advanced Audio Distribution Profile (A2DP) for media streaming instead, audio will not route through the headset for calls. Since the headset works with another phone, the issue is specific to the phone's profile selection or configuration.
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.
- ✗
The headset battery is low.
Why it's wrong here
Low battery might cause intermittent audio, but the headset works with another phone, so battery is not the issue.
- ✓
The phone is not using the correct Bluetooth profile for calls.
Why this is correct
Smartphones can use separate profiles for media (A2DP) and calls (HSP/HFP); if the call profile is not active, no audio is heard.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The headset is out of Bluetooth range.
Why it's wrong here
If out of range, the connection would drop entirely, not just lose audio.
- ✗
The phone's Bluetooth radio is faulty.
Why it's wrong here
The headset pairs successfully, so the radio is working; the issue is profile-specific.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The 220-1201 exam often tests the distinction between Bluetooth profiles (HFP/HSP vs. A2DP) to trap candidates who assume that successful pairing guarantees all audio functions will work.
Detailed technical explanation
How to think about this question
Bluetooth profiles define how devices communicate for specific functions. HFP (Hands-Free Profile) uses a Synchronous Connection-Oriented (SCO) link for real-time audio, while A2DP uses an Asynchronous Connection-Less (ACL) link for high-quality streaming. Some smartphones may incorrectly route call audio to the internal speaker or earpiece if the phone's Bluetooth stack fails to negotiate HFP during a call, even though A2DP is active for media. This is often seen in Android devices where the 'Media audio' toggle is enabled but 'Phone audio' is disabled in the Bluetooth device settings.
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 220-1201 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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Mobile Device Connection Methods — study guide chapter
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Mobile Device Connection Methods — This question tests Mobile Device Connection Methods — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The phone is not using the correct Bluetooth profile for calls. — The most likely cause is that the phone is not using the correct Bluetooth profile for calls. Bluetooth headsets require the Hands-Free Profile (HFP) or Headset Profile (HSP) for bidirectional audio during calls. If the phone defaults to the Advanced Audio Distribution Profile (A2DP) for media streaming instead, audio will not route through the headset for calls. Since the headset works with another phone, the issue is specific to the phone's profile selection or configuration.
What should I do if I get this 220-1201 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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