Originally Posted by
Meerkat
Best to check with the exact airlines you'll be flying with. TG is another which explicitly disallows use of such devices "even in flight-mode", according to their in-flight magazine.
This is not an unreasonable request if it's the airline's policy. That's based on the numbers of people who can hardly distinguish and/or determine if their device is "on" or "off", let alone in some other mode.