the sim card planned to use? I'm quite savvy with devices and technology. I'm giving my sister my old iPhone (2G 2.2) since I recently bought a 3G model. But she has t-mobile, and I have AT&T, and she isn't good with technology, so I'll need to unlock it. Looks like Pwnage is my best option. The only problem is that since she lives in a different country I cannot use her sim card to do so, asking her to mail it out to me would be a little bit ridiculous. Can I use any sim card (maybe the one that was originally in my phone because when I bought the 3G, AT&T sent me a new one), or do I specifically have to use the sim card that will be used in the phone to unlock it? Can the sim cards be switched in an out without having to run the software each time?