[jonknee]

A few days ago I was driving back from Rainier in Washington State and had full bars LTE on AT&T and no service at all on T-Mobile. It was on 410 right outside of Enumclaw, WA. Had to be almost in town to get any signal from T-Mobile.

AT&T and Verizon actually have some coverage inside the park around the Sunrise area (I believe coming from the Crystal Mountain ski area) while T-Mobile has none.

To be fair, the T-Mobile coverage map is extremely spotty in WA so it's not like they're claiming they have a great network here, but it is very noticeably worse than the two largest networks. From their map it looks like they're weak in the whole Northwest. Sort of curious considering they are based here, but I get that the topography is difficult.