Here are some things you can do to troubleshoot your phone’s microphone not working:

t
1. Check the microphone – Make sure the microphone is clean and unobstructed. Additionally, check that the microphone is not muted, or set to the lowest volume.
t
2. Check the device settings – Check if any settings or restrictions regarding microphone use on the device; for example, device permissions.
t
3. Restart the device – Restart the phone and check if this fixes the issue.
t
4. Update device software – Make sure your device is running the latest software version.
t
5. Check the source signal – Check the source app for voice call issues, sound setting, etc.