I'm new to iPhone and just got a white 3G. I want to upgrade to 2.1 (currently on 2.0.2) and use the new windows quickpwn 2.1 to jailbreak it. The thing is, I bought it jailbroken and I didn't know resetting all the content/media would remove the jailbreak. Now when I try to upgrade to 2.1 on iTunes8, it says something about the sim. I don't have an AT&T sim as I'm on TMO. Is there any way I can upgrade to 2.1 without going thru iTunes?