I press the call button and the after 1sec the calls ends and shows "Number Unreachable".
Data and SMS work fine, signal strength is full etc.
I have $0 credit on the phone however have data + unlimited calls/sms shared from a share everything plan.
Samsung Galaxy Note II GT-N7105
Unfortunately I don't have another micro-sim device to test the sim in at the moment however I don't see any reason it would be the phone.