Historically T-Mobile was terrible. They now have native roaming on US Cellular and band 12 (700mhz) and band 71 (600mhz) lowband coverage. This covered a lot o

Historically T-Mobile was terrible. They now have native roaming on US Cellular and band 12 (700mhz) and band 71 (600mhz) lowband coverage. This covered a lot of the gaps. Sprint is weird, since they really only have halfassed voLTE they rely on a giant legacy CDMA network that should have been put out to pasture 5 years ago. But they do have the largest number of roaming agreements if all you care about is ability to call (and not have data). They do have fast data but it requires you to be in line of sight of a tower, not have walls or wet leaves in the way, and have a phone supporting HPUA so you can actually upload things. AT&T's network has basically zero investment in recent years, unless in Georgia or a handful of other markets it's the worst of the 4. Poor spectrum planning, low capex, the only reason they are #2 is because they keep buying up companies with customers (shitty Mexican carriers and DirecTV). Verizon still seems best (hardware, spectrum planning, roadmap, coverage), but no plans ideal for my needs. Poor for travel.