As you probably know by now, today is the day that iOS hackers released the untethered jailbreak for devices running the latest iOS 5.1.1 software.
However, you may have already jailbroken yours using the tethered solution that was released some time ago. If that’s the case, you don’t need go through the whole process again — simply install the Rocky Racoon tweak to turn your tethered jailbreak into an untethered one.
You’ll find the ‘Rocky Racoon iOS 5.1.1 Untether’ in Cydia — all you need to do is install it and then reboot your device. It’s that simple. You’ll now have an untethered jailbreak and you’ll be able to reboot your device at any time, while you’re out and about, without having to hook it up to your computer.
Just be sure you don’t uninstall Rocky Racoon later, because you’ll lose your untethered jailbreak again.
Source: iJailbreak