I currently have a Jailbroken iPhone running on 3.1.3. It has been on 3.1.3 since may and I jailbroke with spirit. I understand the current ios version is 4.2, but there is no untethered jb for it yet. My question is - its still possible to upgrade to 4.1, correct? How do i go about doing that? I also need to back up my cydia apps before hand, correct? Is there anything else I need to backup, or do I just need to sync before I upgrade. I've dug around on google and the boards but I haven't found a clear answer.