With all of the information floating around, I was hoping to get some simple advice for my situation before I purchase the new iPhone 4 tomorrow. I have a 32GB 3GS that was purchased on release day last year (I'm assuming old bootrom). It is currently running OS 3.1.3 and it has NEVER been jailbroken before. I would like to erase all settings and content, jailbreak, and unlock the phone, and then sell it. It seems I can get much more money for the phone if it is unlocked. How can I accomplish my goal? Can I simply Erase everything on the phone itself and then do a Spirit jailbreak, followed by the new Ultrasn0w unlock?