Where I work I'm usually on Edge with AT&T. According to T-Mobile's site, the is one of their towers within a mile of our company. I guess I can hope if I change.
I was in a T- mobile store yesterday and although at least where I live I asked the guy why LTE wasn't displayed on the phones but 4g was. He said that LTE will be rolling out very soon in mi and that the 4g icon meant it was the beginning stages of 4g. I've saw videos where the LTE speed beats Verizon's.