Information For 3GS Owners Who Want To Jailbreak
The iPhone Dev Team has posted a notice for iPhone 3GS owners hoping to jailbreak. A jailbreak will be released relatively soon, they say, but certain files will be needed. They have a new, more reliable method for obtaining these files, but it will only work if you do it before Apple releases another update and if you don’t have the OS 3.1 beta. It should also be noted that this method may update you to the 3.1 beta if it’s on your computer, which would remove your chances of using Ultrasn0w in the future.
Warnings aside, here is their explanation:
You may have read or heard about techniques to capture files during the iTunes restore process. These will be required to jailbreak your phone in the near future, most of the methods involve icky USB snoops. Well, there is an even better and more reliable method to get your hands on those lovely files.
During the restore process iTunes nicely keeps these oh-so-top-secret-files in a lovely accessible place for us to copy out and backup, that place? /tmp on Mac OS X or %TEMP% on Windows. Thanks Apple — handy!
The downside to this approach is that you actually need to go through the restore process to get these signed files, which has risks if you are anywhere near 3.1 or 3.1 beta