I recently got my mom's old iPhone 2G (first generation) and purchased a pre-paid plan with AT&T so I could use the iPhone. I've read success stories on how people have done with (even with the 2G) and I'm stuck. I've successfully jailbroken and unlocked an iPhone 3G before, but I just can't figure this out. I tried restoring the phone to factory settings and now it's stuck on the no SIM card screen/activation screen. I just need to know how to unlock/jailbreak/whatever this iPhone so I can use it. I've tried redsn0w and installed Cydia but still when I put the SIM in it shows "no service." So is there a program other than redsn0w that I can use? Any help would be greatly appreciated. Thank you.