Calls and contacts
Apps and media
Cause 1 of 3: There's a connection error
If your phone doesn't receive any calls when someone calls you, it may be caused by an unknown connection error.
Solution: Restart your phone.
Restart your phone
Open the Reset key cover.
Press and hold the Reset key with a sharp-pointed object (such as a paper clip) until your phone turns off.
Close the cover again.
Press and hold On/Off until your phone is turned on.