Re: Had to take back my iPhone 6!
Are you talking about cell data with the phone or when connecting to your car? ...You said you had no cell data, but, could you make calls? If you could then the issue is with your prepaid account not being set up properly with AT&T (or accidentally put in airplane mode?). If all was ok on their end, then perhaps the phone had 8.0.1 installed on it? I would check as this caused these cell issues. (see next quote too).
Originally Posted by Bill Houlis
OP: As far as bluetooth connectivity goes:
Originally Posted by hurts
In any case, it's an iOS 8 issue that affects some users on various iPhones, not just the 6/6+. I have read on other forums the 8.1 beta fixes many BT issues. 8.1 should be out sometime this month.
(The sim would have nothing to do with Bluetooth, the sim only has to do with connection to your particular cell carrier over cell radios.)