Unfortunately, mine is showing 4G. If I toggle theLTE off it will just display AT&T and the reception bars. OTOH, my wife's iPhone 5 displays LTE and when I toggle it off, then it displays 4G. I am testing them side by side. I have tried turning them off, soft reset, airplane mode, you name it, and my wife's phone keeps coming back to LTE and mine stays in 4G. I did a speed test and my wife's iPhone 5 displaying LTE is twice as fast, so it's not just the icon/label. The phones are clearly interfacing differently with AT&T. The only thing I haven't tried is full restore.
Anyone else having this issue?
EDIT: I swapped the sim cards and now I can replicate the 4g issue in my wife's phone. I guess I don't need a full restore after all. I will stop by AT&T tomorrow to get a new sim card.