What if it wasn't a bomb? As is highly likely.
OK. It could be alq uaedas first phone bomb attck, and they've chosen to plant it by cunningly flying with it and then leaving it where it's likely to be found (as it was found).
They've figured that I'll get it and turn it on. Thus wounding myself.
Or maybe one of the pax left his phone by mistake.
The likelyhood of it ACTUALLY being a real phone bomb is about the same as being shot down by a MANPAD on takeoff, IMHO.
Get a GRIP!