AT&T's Age 55+ plan runs on AT&T for coverage.
It costs $70 per month for 2 lines.
It comes with unlimited minutes, unlimited texts, and unlimited high-speed data per month. You get 10GB, then 128Kbps of hotspot data. Video streams at 480p quality.
Data is deprioritized, so speeds may slow during network congestion.
Taxes and fees are extra. Expect roughly $12.08 more per month, bringing your total to about $82.08.
Overall, I recommend the AT&T Age 55+ plan because it is a good value.
You can also check out these plans with the same coverage and data amount (scroll left and right to browse plans):