Alright, I've been in the Ipod/Iphone world for quite a long time already. Once i got my Iphone 3gs (New boot) and jailbreaked it (3.1.3...yes that's a long time ago) I dont bother keeping up with new updates and stuff. With this said, i came to realise that my jailbreak is very, very old. I would like to update it to at least firmware 4.0 but i dont know where to start and would definately not want to risk to not be able to re-jailberak afterward.... SO Is there a way I can update my jailbreak without restoring my iphone? If not, what's the best/easiest way to get to IOS 4.0 untethered from where i am now? Thank you!