Finally! Notable hacker pod2g and the Chronic Dev Team have released the first untethered jailbreak for Apple’s iPhone 4S and iPad 2.
Jailbreaking your iPhone opens the door to loading unapproved applications and using the phone on other carriers. Not surprisingly, Apple hates its devices being jailbroken and used in unintended ways, so the company regularly issues operating system updates that make it harder to jailbreak. The iPhone 4S, in particular, has taken months to find a full jailbreak.
The new jailbreak for the iPhone 4S and iPad 2 is called “Absinthe A5″ and it can be downloaded direct here. Unfortunately, the Absinthe jailbreak is only available now for Mac users right now, but versions for Windows and Linux are planned to be released soon.
What makes this release such a big deal is that this is an “untethered” jailbreak versus a “tethered” jailbreak. A tethered jailbreak means your phone can only be rebooted when it is plugged into the computer, while an untethered jailbreak means your phone can be rebooted anytime. As someone who’s had a tethered jailbreak on his iPhone 3GS before, I can tell you life is much easier with an untethered jailbreak.
Thanks to pod2g and the iPhone Dev-Team it’s now possible to jailbreak the iPhone 4 and all models of the Phone 3GS untethered. Although iPhone 4S and iPad 2 owners are still waiting for an A5 jailbreak, all iOS devices running iOS 5.0.1 with A4 hardware can now be jailbroken untethered.
This includes the original iPad, iPod touch 3G and iPod touch 4G.

Using redsn0w to jailbreak is a straightforward process, and will install the Cydia app store on your device. This opens up a whole new world of tweaks and apps to improve your iPhone experience and customize operation. Be sure that before you proceed with the instructions, you have installed the iOS 5.0.1 firmware update.