Would anyone know how this scenario would work: I have a BB World Edition with Verizon. It's one of the few phones that you can get a SIM in for Verizon. I travel abroad a lot so had the international plan which provides a SIM for when you are abroad. I'm cancelling the international plan, but Verizon has agreed to keep the SIM activated. If I installed the SIM into the iPhone, I'm assuming I would still be able to get calls and use all of the iPhone functions, right? I have an unlimited calling, text, data plan with Verizon, so would I be charged a roaming fee for using a GSM network instead of the CDMA that Verizon uses here in the US? I'm a newbie to the iPhone, but prefer Verizon's coverage and am under contract to them. Besides, I like ease of use with the Blackberry and have a number of e-mail accounts that go to one inbox on my BB. Plus have the GPS turn-by-turn navigation with Verizon which isn't available on the iPhone. If anyone has any thoughts on this and knows how the above scenario would play out, I'd great appreciate it. I really want the new iPhone, as I wouldn't have to bring my iPod, a camera, and cell phone everywhere I go any more. I would still keep my BB if I was out just for business purposes.