Originally Posted by scott14719
Well, that's exactly what I said to start with but the OP insisted a new SIM was needed for LTE.
Maybe im just a bad bad man trying to spread misinformation to the masses. J/K
I was simply sharing what had been determined by myself and a few at the AT&T store. If its wrong, i apologize. Like i stated we had tested with 2 other SIM cards, the old style and even after several reboots, we could never get it to switch from 4g to 4g LTE. Of course as its been mentioned here, i also find it odd that in the time we had other SIM cards in, i never saw an ISIS error. Maybe my phone is just jank.