iPhone 5S calling problems

Hello everyone,

I have a problem with iPhone 5S phone app
Everything works, wi-fi, mobile data, messages, but i cant answer or make a call. When i try to make a call the phone lags, but on the other side of the line its ringing, and the person who im calling can answer but cant hear me nothing, so do I.
And when I try to answer incomming call i cant do that, and even if I answer it, the phone doesent stop vibrating and we cant hear each other.

Facetime calls, viber calls, everything works perfect, the problem is only with cellular calls.

I try restore, other sim card, but nothing helped me..

Thanks in advance!

btw. It’s my first post here, I hope someone could help me ;););)