[LoneSnark]

If the radio is on there is a chance in hell it might cause intereference. As such, put the phone in flight mode and be done with it. Turning the phone completely off offers no benefits above putting the phone to sleep with the radios off. When the phone is in flight mode it is no different than any regular MP3 player. Feel free to watch movies, play games, or type a letter while in flight.

As with MP3 players and laptops, put it to sleep and stowed for take off and landing as the plane might crash and we don't want you fiddling with putting your phone away when that happens.