I updated my 2g iPhone to 2.2 using iTunes and then used QuickPwn to jailbreak it. Ever since I can't get any signal... even the carrier tab in settings is missing!
major problems... my 2g got stuck in recovery mode. The only way to get it out is to do a full restore, and then re-jailbreak(with unlock). But it gets stuck in recovery mode again. I get to the last screen of quickpwn and it just cannot seem to finish the job.
FLawless , i love it . i have a 2g iphone with 2.1 unlocked and JB . All i did was download 2.2 ipsw then go to itunes hit update. It did its thing then just open up 2.2 quickpwn and jailbreak it and choose unlock also let it do its thing and put it in DFU mode.
Unlocked 2.2, not Jailbroken though. I have used Quickpwn, Winpwn, Pwnage Tool, and I've never had a problem. All you need to do is find a nice tutorial (iClarified) and follow it exactly. No worries.
I had a few minor problems with a new macbook. pwngetool would fail to build, error message, "I haz failed", but the dev team released a new version (2.2.1) a few days ago which solved this problem. When I put the phone in DFU mode iTunes would throw up an error 21 message so I had to restart the phone and do the update from itunes using restore mode. No problems once it was updated.
I just helped a friend who has T-Mobile, an iPhone and Windows Vista. I told him to upgrade to 2.2 via iTunes, which he did, and then run QuickPwn. He selected all the options, including the one to unlock, and everything worked just fine.
If it didn't work for you, I recommend restoring to a fresh 2.2 firmware, and then running QuickPwn again.