This is true that Verizon (AT&T included) cover a lot more physical area. I was in the middle of the forest in northern Michigan, and the only signal out there

This is true that Verizon (AT&T included) cover a lot more physical area. I was in the middle of the forest in northern Michigan, and the only signal out there was from AT&T. As it turned it turned out, T-Mobile allows you to roam if there is no T-Mobile coverage, so I was getting AT&T coverage. I don't think Verizon can be considered high end, at least not definitively. Wherever T-Mobile does have coverage, their speeds are higher, and their offering of international roaming and by-default unlimited data are clearly geared to the "upper" end of the market of professionals that live in cities, that travel frequently.