As we told you a bit earlier in the day, if you're using a tethered jailbreak for iOS 6.1 via the RedSn0w method, then you can easily convert that tethered jailbreak into an untethered jailbreak by means of a Cydia package.
Indeed, by downloading the evasi0n package from Cydia, you can transition over to an untethered jailbreak in just a few steps. While this isn't perhaps the most ideal way to achieve an untethered jailbreak, it is nice to have the option. This is especially useful for users who already have a ton of Cydia packages downloaded. By using this method, you don't have to reinstall all of your Cydia apps and tweaks. Given the state of Cydia right now, that's a very desirable proposition.
Take a look inside, as we show you how easy it is to convert your tethered jailbreak into an untethered jailbreak.