I have a black berry curve on boost mobile's network. So there's no sim card. I could easily transfer my service over to Virgin Mobile if I needed too, though. I know and understand that most iphones are made on GSM networks and can't be unlocked for CDMA networks. Got that part. My questions are: What are the loop holes? I saw somewhere that if you have a sim card you can unlock any iphone and just insert it. Is that true? Since Boost and VM are under Sprint's network, is Sprint considered a CDMA network? Could I buy an unlocked Sprint phone and just use Boost? I am the epitome of a begginner when it comes to this type of thing. So if you start with the tech talk I probably won't understand, so please put things as simply as you can. I'll always ask questions regardless, though. Thanks!