Hi I am trying to increase the resale value for my 8GB iPhone 3G and was wondering how I would go about downgrading from iOS 4 to iOS 3 or 3.1.3, whichever is more obtainable. I found an article on LifeHacker in regards to downgrading: http://lifehacker.com/5572003/how-to-downgrade-your-iphone-3g-from-ios-4-to-ios-313 But that requires me to restore from a backup, and I am just trying to set it to iOS 3 and making it blank so the new user can set it up to their liking. I have never unlocked or jailbroken an iPhone so if there was so thorough guide can someone please point me in the right direction? Is it possible to downgrade to iOS 3 from iOS 4 on the iPHone 3G and then to jailbreak it? WHich jailbreak would I use and would it be better to do all this on a Mac or PC? Thanks for reading my post!