Flight Mode is just a way of being sure that all the radio bits are turned off
Gosh, I'd never have guessed.
Back to the point: I still don't get why I can use a Blackberry (any Blackberry) to read my mail, listen to music, watch a video, play a game, or just plain fiddle with out of boredom but my seat neighbour cannot do likewise with their smartphone of brand X or the guy over the isle theirs of brand Y.
All smart phones I've come across are a complete doddle to switch in and out of "antenna off" mode and this works both ways (deliberately switching out and accidentally switching back in)