Is it that the phone has all the radios in it, or is it that the manufacturer makes different models of the same phone with different radios in it? I know the Motorola RAZR was one that came out on all the networks, but each phone was still tied to the radio in it, as there weren't any multi-radio phones available from the carriers.

Really, consider the fact that what is going on here is nothing more than the same gossip from before, but now in electronic format.

People talk, people gossip, people are social creatures, and as it often appears to be, people are cruel. Just because someone wrote a comment about you on some internet 'bathroom wall' or even a real bathroom wall doesn't mean you have to do anything about it, or even recognize it. In both cases, the anonymity of the posting is its very downfall. On the other hand, if you have people outright spreading gossip and clearly linking it back to themselves (the real-world equivalent of saying "yeah, I wrote that"), then the problem is more pronounced, but still the same as before. You can deal with gossip if you know who starts it, or you can deal with gossip by ignoring it.

If colleges can't teach to their students that gossip is best ignored, then we have more things to worry about than the gossip itself.

Yes, I see your point. And it's a valid one at that, because (at least in the US) I don't know of any wireless carriers that are of common-carrier status. Google will have trouble, with whichever technology they choose for the job. Which also leaves one to ponder, that other than the battery life issues of running two different radios: why not use both?

Actually, this particular instance is not a case of Sprint rejecting a Ma Bell SIM card, it's a case of two entirely different wireless technologies. AT&T and T-Mobile in the US run on a more globally accepted standard, known as GSM. However, Verizon and Sprint run on a faster, but less accepted, standard known as CDMA. These two are incompatible with each other; your AT&T phone won't work on the Sprint network because it speaks the wrong language.