T-Mobile coverage covers all the major cities. I travel alot and I have yet to find a major city that T-Mobile does not cover. So T-Mobile can compete with verzion and att. The main purpose of having a smartphone is to consume data, currently att does not allow u to do this. Att could offer me a free iPhone every year and it still would not be worth it.The problem is TMO can't compete in coverage with 3G, let alone 4G/LTE with Verizon or AT&T. They have to offer those things just to compete. The other issue with carriers are tech differences, i.e. CDMA vs GSM. In other countries where it most likely is GSM only, it's a lot easier to BYOD because you have 3-4 choices of carrier.