T-Mobile’s free 1 hr WiFi + full flight texting with the option to use one of four (per year) full flight sessions has been working really well for me. There are higher tier plans with fully unlimited sessions. The only catch has been on Alaska you can select when the one hour starts, but so far on AA you have to start the one hour to get the free texting at all. Has anyone found a way around that?

Just finding it a nice value while flying.

https://www.t-mobile.com/support/coverage/t-mobile-in-flight-connections-on-usmf