I'm thinking about switching from Sprint to T-Mobile once the HTC One drops. I live in Washington DC (in the actual district) and work freelance all around the area. What are people's experience with call and data service on T-Mobile around here? I don't need amazing consistent 4G, by the way; as long as it's at least as good as Sprint's here-and-there 4G coverage and generally sufficient 3G, that's fine. Thanks!