I'm already on T-Mobile. I'm for this mostly because the Sprint network plugs some significant holes for me in places I travel, like northwest Iowa. When they p

I'm already on T-Mobile. I'm for this mostly because the Sprint network plugs some significant holes for me in places I travel, like northwest Iowa. When they put their cross-roaming agreement into effect earlier this year, I suddenly had coverage all along that corridor. Otherwise, I'm stuck with the extremely small data roaming allowance they provide.