It might be old news for some, but I am sure that not everyone is aware of this yet.
The good folks at the iPhone Dev Team did it again and after some days that just seemed too long, they released the new tool called redsn0w. This tool is meant to jailbreak the iPhone 3G only, and only with the firmware 3.0 – jailbreak for the 3GS still hasn’t been released but since the flaw seems to exist in the 3G, it should only be a matter of days (and of the Dev Team getting their hands on a 3GS – feel free to chip in) until the jailbreak is released.
The process is pretty simple, just update to 3.0 normally through iTunes and when that’s done, search for the correct IPSW in the following folder (if you’re using Vista or 7):
C:\Users\<username>\AppData\Roaming\Apple Computer\iTunes\iPhone Software Updates
(For XP, search around the Application Data folders under Documents and Settings)
When you have this file, just feed it to redsn0w and follow the steps. In under 5 minutes you should be running a jailbroken 3.0.
After this is done, if you also want to operator-unlock your phone, you’ll need ultrasn0w. This is the replacement for the long-lived yellowsn0w. In case you weren’t aware of this fact, the new baseband has a hole again, which allows for it to be hacked. This way, we can all use different operator SIM cards without a problem.
To install ultrasn0w, you simply need to add the repo http://repo666.ultrasn0w.com and then search and install the application ultrasn0w on Cydia. Reboot your phone, and you’re done. It really is THAT easy!
So what are you waiting for? Go for it!