I just got my 32GB iPhone and in settings under carrier it says AT&T 13.0. I live in the UAE, not the US. I've ordered the phone from one of the top online retail stores in the country. All their Apple iDevices are unlocked. I even made sure to ask whether the iPhone 5 is unlocked before placing an order even though I truly know that it is. I've yet to receive my nano-sim card, so I can't make sure that it's really unlocked.