I recently bought a USED iPhone 3G on eBay. What I do, is I find iPhone 3G / 3GS's for a cheap price, then I jailbreak & unlock them, then I resell them for about $200 more. THIS iPhone is a little different. It came from Canada, and It is locked with "Rogers" network. If I insert my AT&T SIM card in, It will give the "invalid SIM" message. He left me a "rebel SIM" card to unlock it, but I have no experience with rebel SIM cards. The iphone is stuck on the "slide for emergency" screen. To be able to Jailbreak & unlock it, I need it activated (able to see the home screen) If anyone knows how to help they would be much appreciated. THANKS!