I have a 2.0 iphone 2g unlocked and jailbroke with t-mobile. I really want to upgrade to 2.2 but am worried it will be a big hassle and It wont be unlocked and jailbroke and ill lose all the cool stuff i currently have on it (cydia apps). I am a complete noob and could use a little advice. THANKS!!!
Just to be safe, I do a restore with the new version in Itunes, and if you have windows, use quickpwn. It will install Cydia and Installer, and there you go.