Symptoms
- Video plays back with no audio at all
- Audio very quiet or muffled instead of fully silent
- Sound works fine on phone calls or voice memos
- Issue started after using a case or getting the phone wet
Likely causes
- CommonMicrophone opening blocked by a case or debrisThe video mic is often a small separate opening from the call microphone and easy to cover.
- CommonVideo recorded with mute or a Bluetooth accessory connectedA connected Bluetooth device or accessory can redirect or block audio input during recording.
- PossibleWater or debris in the microphone portMoisture or lint can muffle or block sound entirely.
- PossibleApp-specific microphone permission not grantedSome apps need separate microphone permission for video recording.
What to do
- Check that no case, sticker, or debris is covering the microphone opening.
- Disconnect any Bluetooth headphones or speakers before recording.
- Check microphone permissions for the camera app in settings.
- Test recording a voice memo or making a call to confirm the microphone works in general.
- Clean the microphone opening gently with a soft dry brush.
- Restart the phone and test again.
Tools and parts
- Soft dry brush
When to call a pro
See a repair shop if the microphone doesn't work for calls or voice memos either, since that points to a hardware fault.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.