I think cabin crew would careless about someone with an Iphone when the arse of an engine is strewn through the gardens of an some Indonesian Is?
Yeah, and the flight crew have enough on their hands to deal with without any additional unecessary anomolies possibly created by mobile phone use...
(I'm not saying that this is what happened but there is always that intereference possibility especially if a whole bunch of people get the same idea - despite what Mythbusters might think of mobile phones and aircraft...)