From what I've read, it is possible to unlock the iPhone 3G in two ways: 1) using Windows unlock it via QuickPwn (I'm not sure whether or not the Mac version is currently available) and 2) buy a Rebel SIMcard, which requires you to cut your current SIM card. There is another option, where you don't have to cut your card, but I have not seen any reviews on whether or not it works. Now the main reason I want this is because I travel fairly constantly to China, primarily Beijing and some other regions. I was hoping that I could use my iPhone over there, rather than my current solution of a Treo 650. I'd prefer to use something like Rebel SIMcard, but am hesitant to cut up my current SIM, and also am afraid that this won't even work in China. If anyone has bought this Rebel SIMcard and it has worked, was it easy to set up? Do you just put in the SIM and it automatically unlocks your phone?