The iPhone Dev-Team has announced RedSn0w 0.9.15b1 which brings numerous new features including iOS 6 jailbreak for old devices, ability to restore to older firmware, manipulating SHSH blobs and etc.
iOS 6 jailbrak is tethered for
iPhone 4S, iPhone 5, iPad 2 and iPad 3 are not supported.
We will create our step-by-step tutorials soon.
You can download RedSn0w 0.9.15b1