Quote from that Economist article...
at that point the prospect of taking a cut of the sky-high calling charges will miraculously cause our safety concerns about mobile phones to evaporate.
Or, last time I flew on Norwegian, the airline's wish to offer a fantastic, free, wifi service on board, to which one's mobile/smartphone/tablet/laptop/netbook/whatever can connect when switched on and not in "Flight Mode", for the the benefit if its customers, and of course to attract them in the first place.
The service terminated at 10,000ft, but I understood this was not for safety but to allow CC to get the cabin in shape for landing.
Presumably EASA, Boeing, and the Norwegian CAA, to name but a few with the power to prevent this happening have not found a need to do so. And so far as I know the new Norwegian Boeings do not have special wiring and electronics protected against mobile phones etc.