Pointless, completely useless overpriced gadget for poseur big kids with a lot of disposable income and absolutely no sense/intelligence whatsoever. No doubt filled with idiotic, childish "apps" to show off to like-minded immature simpleton mates. With the ability to play much rubbish music illegally downloaded from t'net. Also complete with various other silly useless gadgety functions of absolutely no use whatsoever to any normal human being except to entertain said braindead users. And to obnoxiously, loudly, antisocially telephone aforementioned mates from various public places, muchly irritating the general public.
Nope. Absolutely no use or place at all in aviation.
Smithy