flagged as it's off topic, misleading (mobiles do affect navigational equipment (ILS) and screens, particularly when far away from cell towers, see http://www.caa.co.uk/application.aspx?catid=33&pagetype=... ), ill informed (a plane during descent or takeoff can get into emergency quite quickly and FAs need passengers to pay attention, which is more of a reason to switch it off than the interference) and duplicate (see http://news.ycombinator.com/item?id=3406167 ) blabber