I have an iPhone 4S JB'en with AT&T and am considering leaving for VZW. All 4S devices have the same Broadcom chipsets (CDMA/GSM) so technically the iPhone 4S's don't differ from carrier to carrier (aside from a few software tweaks). Question: If I were to purchase a cheap phone on VZW is there any way to use my AT&T iPhone 4S on their network? I'm guessing a flat-out no as it is a subsidized iPhone, but never hurts to ask. Thanks!