My account and all of my family have the same problem. My number as most of the world begins with the sign ( + ) then the Country code 58 then the area code and then the phone number, for example +1 305 555 5555. In my case and all of my family the country code does not appears giving a number such as +30 55 555 55 5. This creates a problems because no one can contact me through my number with iMessage nor FaceTime. I've tried everything from changing my number manually to re setting the network setting.