i have the same problem too.. i can received calls and text but the problem when i try to call using this iphone using universal sim , i cannot make call it always call failed and the signal is dropping but after a while it returning signal again but the same cannot make call. i try all settings of universal sim but the same problem even i try rebel sim it the same..what is the problem?
UNIVERSAL SIM TEAM WHAT IS YOUR ANSWER ABOUT THIS PROBLEM?
