A technician is troubleshooting a smartphone that intermittently loses cellular signal. The device shows full bars in some locations and no signal in others. Which diagnostic tool should the technician use to identify the problem?

A Wi-Fi analyzer to check for channel congestion.

A multimeter to test the phone's antenna connector.

A signal strength meter app that shows dBm values and network information.

A loopback plug to test the phone's cellular port.

Which diagnostic tool is commonly used on mobile devices to test the functionality of the touchscreen, sensors, and buttons?

Built-in diagnostic mode or manufacturer diagnostic app

A user reports that their Bluetooth headphones pair with their phone but produce no sound. Which solution is most appropriate to try first?

Check the phone's media volume and Bluetooth audio output settings

A technician is replacing a cracked screen on a smartphone. After removing the old screen, what should the technician do BEFORE installing the new screen?

Power on the phone to test the new screen before fully securing it.

Clean the adhesive residue from the frame and ensure the new screen's connectors are aligned.

Apply a new layer of thermal paste to the screen's backplate.

Disconnect the battery to prevent electrical damage.

CompTIAA+ Core 1

Domain 1Objective 4

Troubleshooting 220-1201 Practice Questions (Page 4)

Part of the Mobile devices domain, which accounts for 13% of the 220-1201 exam. CompTIA does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–8 in this domain), expect 1–2 from this objective — we provide 30 practice questions to prepare you well beyond it. (estimate)

30questions here

6free pages

7concepts

13%of the exam

Questions 16–20

16foundation · easy
Which software tool can be used to diagnose Wi-Fi connectivity issues on a mobile device by analyzing signal strength and network details?
Select an answer first
17application · medium
A technician is troubleshooting a smartphone that intermittently loses cellular signal. The device shows full bars in some locations and no signal in others. Which diagnostic tool should the technician use to identify the problem?
Select an answer first
18foundation · easy
Which diagnostic tool is commonly used on mobile devices to test the functionality of the touchscreen, sensors, and buttons?
Select an answer first
19foundation · easy
A user reports that their Bluetooth headphones pair with their phone but produce no sound. Which solution is most appropriate to try first?
Select an answer first
20application · medium
A technician is replacing a cracked screen on a smartphone. After removing the old screen, what should the technician do BEFORE installing the new screen?
Select an answer first

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