I need help urgently. I have restored my iPhone 2G using iTunes to 3.1.3. Then I used redsn0w 0.9.4 on Windows to jailbreak and unlock. Everything went fine, except when I insert SIM, I get "SIM Failure" message and 'Invalid SIM' in the top left corner. I do not have an AT&T SIM to put in it to activate it. Please help! This is urgent as I wanted to sell the phone tonight, but now I cannot show that it works. Thank you!