The current version of IOS 6 is a beta, this means that the jailbreak will allow us RedSn0w is aimed at developers . Currently the only ones who can install iOS 6.
If you are interested you can download and jailbreak that it is thetered. Further, the process changes a little to begin with does not install Cydia, and is not suitable for users with little knowledge as a process is not as graphic as other versions of the tool.
Once the process we go through the file system which will surely help the most skilled to check option to activate some tweaks by current limitations in all devices.
Step 1: Download and open RedSn0w 0.9.13dev1.
Step 2: Click Extras > Select IPSW, and point to your iOS 6 firmware file for your device.
Step 3: Click back and Click jailbreak. Place your device into DFU mode, and the jailbreak should begin. RedSn0w will prompt you to Install SSH. Make sure that option is checked, and click Next. the jailbreak will proceed until completion.
Step 4: Once on your Home screen, go back to RedSn0w and click Extras > Just boot. This will perform a tethered boot. You will need to place your device into DFU mode again to proceed.
Step 5: Once the tethered boot is completed, your device will go back to your Home screen. Congratulations, your device is now jailbroken. You can now use SSH, or another iPhone file navigation utility to browse the default file structure. This may allow you to install apps and tweaks manually if need be. Again, this is for advanced users only, as no GUI interface is there to help you through this process.
Finally note that only works on the iPhone 3G, iPhone and iPod Touch 4 fourth generation.
Via: Blog iDownload