Question 534 of 1,020

Mobile Device Accessories →hardMultiple ChoiceObjective-mapped

Bluetooth Earbuds Disconnect When Phone in Pocket: Fix

This 220-1201 practice question tests your understanding of mobile device accessories. 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 complains that their wireless Bluetooth earbuds frequently disconnect during calls when their smartphone is in their pocket. The earbuds work fine when the phone is on a desk. Which accessory or configuration change is most likely to resolve 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.

A
A Bluetooth signal booster app
Why wrong: Signal boosters are hardware-based; apps cannot increase Bluetooth radio power.
B
A Bluetooth neckband style headset
Neckband headsets have the Bluetooth receiver near the user's collar, reducing signal blockage from the body.
C
A metal phone case
Why wrong: Metal cases can actually worsen Bluetooth signal by blocking the antenna.
D
A Wi-Fi analyzer to change router channels
Why wrong: Wi-Fi interference is possible but less likely in this scenario; the issue is body blockage, not interference.

Full breakdown with real-world context →

Quick Answer

The correct answer is a Bluetooth neckband style headset. This resolves the issue because the human body is dense with water and can significantly attenuate Bluetooth’s 2.4 GHz signal, especially when the phone is in a pocket, creating a physical barrier that disrupts the line-of-sight between the earbuds and the transmitter. A neckband positions the Bluetooth receiver closer to the phone’s antenna, often above the shoulder, bypassing the body’s signal blockage. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of wireless signal propagation and common interference sources—a frequent trap is assuming Wi-Fi interference or a weak battery is the cause, but the key clue is that the earbuds work fine on a desk. Remember the memory tip: “Body blocks Bluetooth; neckband beats the barrier.”

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

✓

A Bluetooth neckband style headset

The issue is that the smartphone's Bluetooth antenna is being physically blocked or attenuated by the user's body (specifically the leg/torso) when the phone is in a pocket. A Bluetooth neckband-style headset places the Bluetooth receiver and antenna around the user's neck, which is typically above the pocket and has a clearer line-of-sight to the phone, significantly reducing signal obstruction and multipath interference. This configuration change directly addresses the physical signal path problem without requiring any software or network changes.

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.

✗
A Bluetooth signal booster app
Why it's wrong here
Signal boosters are hardware-based; apps cannot increase Bluetooth radio power.
✓
A Bluetooth neckband style headset
Why this is correct
Neckband headsets have the Bluetooth receiver near the user's collar, reducing signal blockage from the body.
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.
✗
A metal phone case
Why it's wrong here
Metal cases can actually worsen Bluetooth signal by blocking the antenna.
✗
A Wi-Fi analyzer to change router channels
Why it's wrong here
Wi-Fi interference is possible but less likely in this scenario; the issue is body blockage, not interference.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The 220-1201 exam often tests the misconception that Bluetooth issues are always caused by RF interference or software problems, when in reality the most common cause of intermittent disconnections with portable devices is physical signal obstruction by the user's own body.

Trap categories for this question

Scenario analysis trap
Wi-Fi interference is possible but less likely in this scenario; the issue is body blockage, not interference.

Detailed technical explanation

How to think about this question

Bluetooth Classic (BR/EDR) uses adaptive frequency hopping (AFH) over 79 channels in the 2.4 GHz band, but the human body is a significant attenuator of 2.4 GHz signals, with water content causing absorption losses of 10-20 dB or more. When the phone is in a pocket, the body can block the direct path, forcing the signal to diffract around the torso, which increases path loss and can cause the link to drop below the receiver sensitivity threshold (typically around -70 to -80 dBm for Class 2 devices). A neckband headset improves the link budget by reducing the distance and obstruction between the phone and the headset's antenna.

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.

Visual reference

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 Accessories — This question tests Mobile Device Accessories — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: A Bluetooth neckband style headset — The issue is that the smartphone's Bluetooth antenna is being physically blocked or attenuated by the user's body (specifically the leg/torso) when the phone is in a pocket. A Bluetooth neckband-style headset places the Bluetooth receiver and antenna around the user's neck, which is typically above the pocket and has a clearer line-of-sight to the phone, significantly reducing signal obstruction and multipath interference. This configuration change directly addresses the physical signal path problem without requiring any software or network changes.

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.

About these practice questions

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Same concept, more angles

1 more ways this is tested on 220-1201

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. During a conference call, a user complains that their wireless earbuds keep disconnecting from their smartphone every few minutes. The earbuds work fine when paired with a different phone. What is the most likely cause?

medium

A.The earbuds have a low battery.
B.The smartphone's Bluetooth driver is outdated.
✓ C.Bluetooth interference from other devices in the conference room.
D.The earbuds are not compatible with the smartphone's Bluetooth version.

Why C: Option C is correct because Bluetooth operates in the 2.4 GHz ISM band, which is shared with Wi-Fi, cordless phones, and other wireless devices. In a conference room with many active devices, RF interference can cause packet loss or retransmission delays, leading the Bluetooth Adaptive Frequency Hopping (AFH) mechanism to fail to avoid all congested channels, resulting in periodic disconnections. The fact that the earbuds work fine with a different phone isolates the issue to the smartphone's environment rather than the earbuds themselves.

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Question Discussion

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