People on the other end of my calls complain that they can't hear me clearly, or that my voice sounds muffled. I've tried different locations, but the issue persists.

Take your phone to a reputable repair shop to have the fingerprint sensor diagnosed and potentially replaced.

Reach out to the phone manufacturer's customer support for potential repair or replacement options.

Attempt to register and use a different finger to see if the issue is specific to one finger.

Wash and thoroughly dry your finger before attempting to use the sensor.

Visually inspect the sensor for any visible scratches, cracks, or other physical damage.

Gently clean the sensor with a soft, dry microfiber cloth to remove any debris or smudges.

As a last resort, a factory reset will revert the phone to its original settings, potentially fixing deep-seated software problems.

Clearing the cache partition can resolve system-level issues without deleting personal data.

A simple reboot can often resolve temporary software glitches by clearing out temporary files and processes.

If other solutions fail, the microphone may need to be repaired or the device replaced.