I feel like the service would be spotty enough that it would only work around takeoff and landing anyway. I've accidentally left my phone on several times while

I feel like the service would be spotty enough that it would only work around takeoff and landing anyway. I've accidentally left my phone on several times while flying and never had service. Not sure if it was due to the altitude/speed or just the fact that 99% of the land you fly over is empty.