iPhone 4 - Cant Make / Receive calls
i have iPhone 4 factory unlocked at 4.2.1 have bb 3.10.1
some time what happens is that i have full signal bars along with the edge icon, iPhone seems to be connected to the carrier .... but when i try to make a call or send sms it fails and similarly when someone calls me they get number not responding ....
I am really worried and confused and 4bout this thing ... its a Brand new iPhone never Jail Broken. :confused: