I think you are not supposed to use any electronic stuffs when the plane is taking off or landing.....they will broadcast to remind all passenger to off their mobile and electronic equipment during that peroid.
I got a telling off by the stewardess when I was holding....yes..just holding my camera and not even taking pictures or trying to take pictures while the plane was preparing to land while on a budget airline in Australia.... :dunno:
Nonetheless, I was happily snapping away on the way back to Singapore without causing any distress to the staffs on board....thus I think it's alright to do it except during taking off or landing.... :blah:
shldn't be a problem, in reality, i had attend aviation course b4 and according to the pilot, normally not a problem with electronics, its juz that probable tiny chance that the device might interfere with on board electronics.