Mic Not Working on Calls: Causes and Fixes

There are few things more frustrating during an important call than being told by the other person that they cannot hear you at all, or that you sound very muffled and distant. At our Keshavpura shop we diagnose microphone problems frequently, and we follow a consistent sequence of tests that quickly identifies whether the fix is simple or requires proper repair. This guide shares that process with you.

First: Confirm It Is the Microphone

Open the voice recorder app on your phone and record yourself speaking for ten seconds, then play it back. If your voice is captured clearly on the recording, your microphone hardware is working and the problem is likely in the call routing or a specific app's permissions. If the recording is silent or very faint, you have confirmed a microphone fault.

Also test by making a call with speakerphone on. On many phones there are two microphones, the main microphone at the bottom of the phone (used during normal calls and recording) and a secondary microphone at the top (used for noise cancellation on speakerphone and video calls). If speakerphone calls are fine but normal calls are not, only the secondary mic may be affected, or the audio routing is the issue.

Check the Microphone Opening for Blockage

The microphone on most phones is a tiny pinhole at the bottom of the device, often next to the charging port. This pinhole is incredibly easy to block without noticing. Common blockers include:

• A phone case that covers the microphone hole, some cheaper cases are cut slightly wrong and partially obstruct the mic
• Dust and lint from pockets, in Kota's dusty conditions this is a genuine and frequent cause
• Dried liquid residue from a splash or monsoon rain sitting over the pinhole
• A screen protector that has been applied too far down and covers the bottom microphone grille on certain models

Remove the case and inspect the microphone pinhole carefully. Use a clean toothpick or very soft brush to gently dislodge any visible debris. Do not push anything into the pinhole itself, this can damage the microphone capsule directly behind it.

Check App Permissions

For video call apps like WhatsApp, Google Meet, or Zoom, microphone permission must be granted specifically to that app. Go to Settings, then Apps, then find the relevant app, and check its Permissions. Ensure Microphone is allowed. On some Android versions a recent update may have reset app permissions, causing calls to go silent without warning.

Restart and Test Again

A full restart clears audio driver states and often resolves temporary microphone failures caused by software glitches. After restarting, make a test call and use the voice recorder test again. If the mic works immediately after a restart but fails again later, a rogue background app may be holding the microphone open and blocking other apps from using it, check which apps have microphone access and remove it from any you do not recognise.

When Hardware Repair Is Needed

If the voice recorder test confirms the mic is not picking up audio, and cleaning the pinhole and checking permissions has not helped, the microphone capsule itself is likely damaged. Common hardware causes include:

• Water damage: Water entering the microphone pinhole during monsoon rain or a splash can corrode or short the microphone capsule, often quickly and permanently.
• Physical impact: A hard drop that drives the microphone capsule against its housing can cause permanent failure.
• Board-level fault: In some cases the audio IC on the motherboard that processes the microphone signal has failed, this requires micro-soldering rather than a simple mic replacement.

Typical Microphone Repair Costs in Kota

Repair Type	Typical Price Range
Microphone module replacement	₹300 - ₹1,000
Charging flex replacement (mic integrated)	₹400 - ₹1,500
Audio IC repair (board-level)	₹1,200 - ₹3,500
Board cleaning after water damage	₹300 - ₹800

On many phones the microphone is part of the same flex cable as the charging port, so both may be replaced together. We check this and confirm the exact cost after a free diagnosis, you pay nothing for the check-up.

Come to Our Keshavpura Shop

If the troubleshooting steps here have not resolved your microphone problem, bring your phone to us. We will run the voice recorder test, inspect the pinhole, and open the phone if needed to check the mic module and its connection. Microphone repairs are quick and generally affordable, and we will give you a firm price before starting any work.