[citation][nom]toadhammer[/nom]For phones, if the issue is too many on and trying to hit the local cell tower, there are solutions. It's relatively cheap to put a pico cell on a plane, if they can find the space. Think of it as the cellular equivalent of those phones embedded in the seat backs.And, the cellular version of this has existed (tested, everything) for several years. I can think of trials as far back as 2007.Edit: I work as a software engineer for a manufacturer of cellular network equipment.[/citation] And I meant, tested on planes, multiple trials, multiple airlines, multiple countries over the last 6 years. It's safe. If signal interference was a problem, the trials would have stopped as soon as they started. The restriction on using your device as a phone at 10000 ft is more of an FCC issue than an FAA issue. Putting a cell on the place solves that. It's just a matter of agencies being very slow to grant approval.
Oh - I forgot to add that there are several airlines around the world who explicitly allow service, and that one of the remaining items are the serious social issues involved, and those are probably what is holding things back. No one wants to be on a long flight with a seatmate yakking on their phone the whole time. I'm personally betting that the rules will quietly go through allowing wifi access and similar simple devices, while somehow still banning voice.