Specifically, T-Mobile has deployed their 700MHz blocks throughout the country, which gives them much better indoor and rural coverage. You need to make sure yo

Specifically, T-Mobile has deployed their 700MHz blocks throughout the country, which gives them much better indoor and rural coverage. You need to make sure your handset supports LTE band 12 to take advantage of it. They also have a significant amount of recently-purchased 600MHz spectrum (LTE band 71) which they are in the process of lighting up.