I live in Columbus OH and in one area at the JPMorgan Chase bldg at Polaris I can get LTE. But, I've changed my apn to the epc.tmobile.com from the fast apn because 4g is better with that here. I can get LTE with both apn. So was just wondering does the apn really matter with Tmobile or should I just stay with the one that works best for me until Tmobile gets updated? If anyone knows, thanks!! I'd post screens but right now I'm on the wpcentral app and I don't see that option!