Samsung S4 1337 ATT no sound on calls.

[Android Central Question]

Places and receives calls but no sound on either end. They can't hear me, I can't hear them. BUT has sound on both ends when I use a bluetooth device. At wits end. Please help.

 

[B. Diddy]

Welcome to Android Central! Is everything fine with a wired headset as well? If so, then it could be a problem with both the earpiece speaker and the primary phone mic on the phone. Does this also happen in Safe Mode? https://support.t-mobile.com/docs/DOC-27781