evasion 0.x Untether is a patch released tonight in Cydia, he helping iDevice owners to transform a tethered jailbreak a untethered jailbreak. The patch is compatible with iOS 6, iOS 6.0.1, iOS 6.0.2 si iOS 6.1, but he is only useful for iPhone 3GS, iPhone 4 si iPod Touch 4G, these being the only terminals on which tethered jailbreak can be done using redsn0w. You install the patch from Cydia right now, he will make some changes in your iDevice, reset the terminal and after the reset you will have a untethered jailbreak.
In the case of the same 3 devices, you can use this jailbreak tutorial tethered for iOS 6.1 to jailbreak iOS 6.1 and hack the terminal, and then you can turn the jailbreak into an untethered one using the patch from Cydia. evasi0n does not hack for iDevices, so this is the only method to hack an iPhone 3GS or iPhone 4 on iOS 6 – iOS 6.1. Unfortunately, the method does not work on iPhone 4S or iPhone 5.
UPDATED: Jailbreak tutorial using evasi0n you have here.
