During a call my phone goes silent.

[Android Central Question]

During a call my phone goes silent. Mute button is not pressed. I can not hear the other person and they can not hear me. How do I fix this?
After 10 - 20 minutes talking to someone our sound is lost. Neither person can hear each other.

 

[B. Diddy]

Welcome to Android Central! Which phone? Does this happen in Safe Mode as well?