Finally, there is a jailbreak for iPhone OS 3.1.3. The jailbreak is called Spirit. We have mentioned the Spirit jailbreak before after seeing a few videos of an unlocked iPad and iPad 3G.
The Jailbreak works on the 3.1.2, 3.1.3 and 3.2 iPhone OS covering all 3G and 3GS models as well as the Apple iPad. Also the jailbreak is untethered which means if you run a later iPhone 3GS or an iPad then you don't need to run the Spirit jailbreak each time you restart your device.
One thing to note though that this is "NOT" an unlock for the iPhone. If you are using another SIM card then it would be best not to jailbreak with the Spirit app until the team make a working unlock for it.
Also, the iPad version jailbreak is still in beta and occasionally crashes the iPad if some apps are installed through Cydia that are not designed for the iPad. A restore will need to be done if this happens to your iPad.
Other than those rules above you should be good to go. The Spirit download can be found over here and if you have problems running the Windows version then switch the application to Win 95 or Win 98 compatibility mode.
