It is worth noting, however, that T-Mobile has some serious problems. There are large swaths of this country where T-Mobile simply doesn't have service. For instance, last time I drove from Denver to Chicago I lost reception 1 hour into the trip and got it back a few hours before I arrived. There was perhaps one town where I had service during the drive. I thought that this couldn't possibly be right, but I stopped by a T-Mobile store and confirmed that this is the case. I thought that mobile providers worked to ensure that your phone would work at least when you are on an interstate, but not with T-Mobile.
Also, unlimited Internet doesn't really mean unlimited Internet in practice. They throttle so heavily after I hit my 5 GB cap that they might as well have cut off the data plan. Programs stopped working as the requests would time out and the app would assume I had no connectivity.