HI everyone? My mom just got the 6 (4.7" model) last night from AT&T. We activated it online and everything registered. At first, LTE popped up, then went away and then came back on. Now no matter what, we cannot get the phone to connect to LTE. My iPhone 5 was sitting on 3 bars LTE the whole time. I have tried: Toggling LTE Resetting the network settings Airplane Mode And nothing works. She even took it to work today and its still on connected to "4G". The phone is beautiful and works fine other than that. This doesn't mean its defective does it?