Dropping calls
Yesterday I updated to iOS 8.1 and today, all calls Im making, they got dropped, and appears an error message on the screen saying something like: Call failed and gives me the option to cancel or to try again. But this is happening on each and every call I make.
After a few moments that the call went thru, the other person starts to say Im breaking off, and then my call is dropped.
Any ideas how to solve this out?
iPhone 4s (8GB), iOS 8.1