In case you’re trying to avoid upgrading to iOS 7 (or simply can’t on your device) you can do so now with the new p0sixpwn jailbreak.
It’s developed by ih8snow, winocm and SquiffyPwn. It works with the last three versions of iOS 6 (iOS 6.1.3 and above).
You can check out the jailbreak on its official website. We are on iOS 7, so we can’t test it out. Use it only if you’re comfortable with jailbreaks.