Galaxy 3

Essalam Alikim
Sorry, the keyboard I am using is not typing in Arabic

I have a problem with my Galaxy S3

Every thing is fine, and I am happy that I have it

I was using viber smoothly, without any problem

bu recently, If I could somebody or some one called me through viver, I will not be able to hear him, although the other person on the line is hearing me clearly

Calling through GSm is fine and I can hear everybody

what do you think is the problem

Waiting for answers and help.

Thank you