Nokia Lumia 920 Call interrupted

[BrNcO]

Hello, I would like to ask if anyone knows how to fix interrupting calls. I tried to call on any telephone numbers but always when dialing (2-3 seconds) to write "call interrupted.

If anyone knows a way to fix it so I will be very grateful
Sorry for bad English (I used Google translator: D).

 

[Miroslav Bula]

No replies? Change your setting to 2G network. It will work now. Problem still persists, no fix avaiable. :-(