We have Verizon via Tracfone for our phones, and AT&T as our primary data provider with Verizon as a backup. We also have VOIP apps on our phones, so even if we should happen to find a non-Verizon area where only AT&T works, we still have phone service. We have previously had both Sprint and T-Mobile services, and dumped them both due to poor coverage. T-Mobile is better than Sprint, and T-Mobile has even better coverage if you have a new enough device that supports all five of the frequency bands T-M uses now, including band 71 that they're rolling out this year. Verizon and AT&T still beat it on overall coverage though.