They're ok from what I've seen. The thing is, the geography of the puget sound area is hilly and there are trees literally everywhere and they're dense. T-Mobile is good where there's coverage but I feel like in most places when I look at a T-Mobile phone I see 1-2 bars LTE, 4G or Edge in some cases. Part of that is that I live in a forest and most of the places I go to are bad coverage-wise overall, but compared to the other carriers, they're pretty good.