iOS 6 Jailbreak
Upgrade to iOS 6 by going here: http://goo.gl/ac8bJ
Step 1: Download the latest version of Redsn0w for the relevant operating system from the iPhone Dev Team (Windows/Mac) or (Windows/Mac).
Step 2: Extract the contents of the downloaded compressed file and save it to a familiar location on your PC or Mac.
Step 3: Run the executable Redsn0w file, making sure to run in administrator mode if using a Windows based machine. If you are on OS X Mountain Lion, start Redsn0w by Ctrl-Click on the icon and then selecting Open from the new menu.
Step 4: Select the Extras option from the main menu of the Redsn0w interface and point it to the desired IPSW file.
Step 5: Redsn0w has advanced dramatically with the last few major revisions and now has the power to whip through the jailbreak without much interaction. Follow the onscreen instructions (Redsn0w might ask you to enter DFU mode) to complete the jailbreak process.
How to boot tethered on iOS 6:
As already mentioned above, this is a tethered jailbreak, therefore you will be required to boot into tethered-mode every time you reboot your device. This can be done by starting Redsn0w: click on the “Extras” button on screen and then simply click on “Just Boot” option and follow the on-screen instructions. Once done, you will be rebooted back into tethered-jailbreak mode.
This Jailbreak DOES NOT install Cydia.
If you want to install Cydia go to this link;
(If this link does not work just look through this website and it should be near by.)