said by Vchat20:
Good luck actually making a call at 30k+ feet in the air. It just won't happen. Unless the airline deliberately puts picocells in the aircraft to accomplish it. Just for shits and giggles, try turning off airplane mode inflight and see what happens to your signal. 1 bar or less and constantly going in and out of service.
Near future may change that
As the airlines roll out inflight internet access, they could potentially add micro cells - cellular to net devices - if FAA would allow it