- A
The car's Bluetooth system does not support the phone's Bluetooth version.
Why wrong: Bluetooth is backward compatible; version mismatch would usually prevent pairing entirely, not cause partial audio failure.
- B
The phone is only connected for phone calls (HFP) and not for media audio (A2DP).
Many Bluetooth connections separate call audio and media audio; if only HFP is active, media audio remains on the phone.
- C
The car's speakers are defective.
Why wrong: Defective speakers would affect all audio, not just media, and the scenario states the car plays call audio through its speakers.
- D
The phone's audio output is set to 'Speaker' in the call app.
Why wrong: This setting only affects the current call, not the persistent Bluetooth profile configuration.
Question 286 of 1,020
Bluetooth A2DP vs HFP: Car Audio Not Playing
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 is trying to connect their smartphone to a car's infotainment system using Bluetooth for hands-free calling. The phone pairs successfully, but audio only plays through the phone's speaker, not the car's speakers. Which of the following is the most likely reason for this issue?
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.
Quick Answer
The answer is that the phone is only connected for phone calls (HFP) and not for media audio (A2DP). This happens because Bluetooth profiles govern what a connection can do; the Hands-Free Profile (HFP) handles voice calls, while the Advanced Audio Distribution Profile (A2DP) is required for streaming music, podcasts, or any media audio. When a smartphone pairs but only establishes HFP, media audio still routes through the phone’s speaker instead of the car’s system. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of Bluetooth profiles and their role in audio routing—a common trap is assuming a successful pairing guarantees full functionality. A quick memory tip: think of HFP as “Hands-Free Phone” for calls only, and A2DP as “Audio To Dashboard Player” for media.
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 only connected for phone calls (HFP) and not for media audio (A2DP).
The phone pairs successfully but only plays call audio through the phone speaker, which indicates a profile mismatch. Bluetooth Hands-Free Profile (HFP) handles phone call audio, while Advanced Audio Distribution Profile (A2DP) is required for streaming media audio to the car speakers. If the phone is connected only for HFP (often the default for call-only connections), media audio will not route to the car, even though pairing succeeded.
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 car's Bluetooth system does not support the phone's Bluetooth version.
Why it's wrong here
Bluetooth is backward compatible; version mismatch would usually prevent pairing entirely, not cause partial audio failure.
- ✓
The phone is only connected for phone calls (HFP) and not for media audio (A2DP).
Why this is correct
Many Bluetooth connections separate call audio and media audio; if only HFP is active, media audio remains on the phone.
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 car's speakers are defective.
Why it's wrong here
Defective speakers would affect all audio, not just media, and the scenario states the car plays call audio through its speakers.
- ✗
The phone's audio output is set to 'Speaker' in the call app.
Why it's wrong here
This setting only affects the current call, not the persistent Bluetooth profile configuration.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The 220-1201 exam often tests the distinction between Bluetooth pairing (which succeeds) and profile-specific connection (which may fail), leading candidates to incorrectly blame hardware or version incompatibility instead of recognizing the missing A2DP profile.
Trap categories for this question
Scenario analysis trap
Defective speakers would affect all audio, not just media, and the scenario states the car plays call audio through its speakers.
Detailed technical explanation
How to think about this question
Bluetooth profiles are layered on top of the core Bluetooth specification; HFP (Hands-Free Profile) uses a SCO (Synchronous Connection-Oriented) link for narrowband or wideband speech, while A2DP uses an ACL (Asynchronous Connection-Less) link with SBC or optional codecs for high-quality stereo audio. In many car infotainment systems, the user must explicitly enable 'Media Audio' in the phone's Bluetooth device settings after pairing, otherwise only the HFP connection is established, causing the symptom described.
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.
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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 only connected for phone calls (HFP) and not for media audio (A2DP). — The phone pairs successfully but only plays call audio through the phone speaker, which indicates a profile mismatch. Bluetooth Hands-Free Profile (HFP) handles phone call audio, while Advanced Audio Distribution Profile (A2DP) is required for streaming media audio to the car speakers. If the phone is connected only for HFP (often the default for call-only connections), media audio will not route to the car, even though pairing succeeded.
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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