problem with I 5 phone. phone is able to send and receive texts but will not let me make any calls out or will not receive any calls either and the mobile has plenty of coverage. I brought it into a votophone shop on Saturday and they said that it might be the sim and they put a new sim into my phone and worked fine for about five hours or so and went back to the same again and left me not able to make or receive calls and just comes with a engaged tone when trying to make a call has anyone on the list experience anything like this before and what did they do to solve the problem Appreciate your help Paddy