The pwnagetool 3.1 released earlier was able to jailbreak iPhone 3G 3.1 OS(which also helps in iPhone 3G 3.1 OS unlock) but now the dev team has finally released the tool providing the jailbreak of iPhone 3GS device and iPod touch 2G device, both running on 3.1 firmware. This will be a big relief for the iPhone 3G S users who wanted to unlock their phones. The jailbreaking tool is pwnagetool 3.1.3

Some details about the usage of this tool Pwnagetool 3.1.3 –

• GOLDEN RULE: If you are using a iPhone 3G or iPhone 3G(S) with ultrasn0w and rely on ultrasn0w to obtain cellular service then you should only update your device with an .ipsw that is made with the new PwnageTool. There are no second chances with this. You need to remember that PwnageTool will provide an upgrade path to newer versions of the iPhone software in the future.
• PwnageTool will work for the iPhone 3GS assuming you have already Pwned it at 3.0 or 3.0.1
• PwnageTool will work for the iPod touch 2G assuming you have already Pwned it at 3.0 or 3.0.1
• For 3G and 3G(S) users who are Pwned, PwnageTool is your key to updating in the future, just remember to never install an update directly from Apple, always use an .ipsw that has been created with PwnageTool.

The pwnagetool 3.1.3 is released just for mac users, but still not for Windows, so the windows users still have to wait until the official version for windows is released.

Download pwnagetool 3.1.3 –
Official Torrent
Download Link