Don`t hear caller

Question

Android 6.0.1

I can call with Zoiper - but I don`t hear the other site - I don`t hear the caller.

to change the Audio codec doesn`t solve the Problem.

Untill the last update Zoiper works fine.

Best regards Jo

Answer 1

You can try to follow our guide regarding one way or missing audio, here.

Answer 2

If no sound i resolve problem.

Settings... my account... tune network....

To use STUN.... NO. 

Turn to NO !!