I used Erase All Content and Settings on a jailbreakme.com jailbroken but not unlocked iPhone 4 running on iOS 4.0 without doing any research. The phone was only recently activated so it only has SHSH saved for 4.0.2. The phone now gets stuck on the jailbroken apple logo (with the line of non-black pixels up top). I can get the phone into DFU mode but iTunes will only let me restore to 4.0.2 but I would like to preserve the jailbreak. Are there any utilities out there that can save the phone on 4.0?