Just want to give an opinion about America's top 4 cellular carriers.
Verizon - America's most coverage 4G LTE network.
AT&T - America's fastest 4G LTE network.
T-Mobile - America's cheapest 4G LTE network.
Sprint - America's slowest 4G LTE network.
I think Verizon is more aggressive with LTE deployment than AT&T. I grew up in Iowa and I have friends who now live in various parts of the state and only Verizon has them covered (according to the maps) with LTE.