All this talk about preserving basebands and trying to downgrade, but I am wondering what it actually does? I know only certain versions are unlockable, but are you losing anything by not updating? If you keep an old version, is it possible to not have service in some areas because you cannot communicate with a new tower? Are you missing out on improved voice quality with new updates? Can updates provide any change in data speeds? Or is it simply a way for carriers to try and lock you in with their service? It has to do something else, too, right? Just curious.