I was delayed on a flight out of LHR because some woman wouldn't get off the phone. Flight attendant came by a few times to say you need to finish your call. Then the purser told her to hang up and waited next to her for her to comply. Eventually Customer service had to come on board to get her to hang up. This was on a 777 so that's a lot of people to inconvenience.

Oh... I like getting asked by pax if I carry an iphone now.... My response usually is, ''we'll give you a PA if we find ourselves in a bind.''