Hacker p0sixninja just posted the long awaited untethered jailbreak for A5-driven devices running iOS 5 and iOS 5.0.1. The software has been a long awaited followup to the untethered iOS 5.0.1 jailbreak for no A5 devices, which was released last December. According to a couple of blogs, the new jailbreak, called Absinthe A5 was not a walk in the park.

The updated greenpois0n tool is available for download for both Mac and PC. The application and lets iPhone 4S and iPad 2 users jailbreak their device without the need to tether it to a computer for every reboot. The jailbreak can be used with the iPhone 4S and iPad 2.

From 9to5Mac

On Monday, Hacker pod2g pointed at a video by Chronic Dev Team member Dustin Howett that showed a successful untethered jailbreak being performed on an iPhone 4S. The updated greenpois0n tool takes advantage of the so-calledcorona exploit by hacker pod2g. It should be noted that both the iPhone Dev Team and Chronic Dev team collaborated on the project, with help from countless contributors and jailbreak enthusiasts around the world.

Here is the step by step.

How to Jailbreak the iPhone 4S or iPad 2 with Absinthe

Step 1: Download, extract, and run Absinthe from our downloads page.

Step 2: Connect your iPhone 4S or iPad 2 via USB.

Step 3: Click “Jailbreak” to run the Absinthe jailbreak. It will take a while on the beginning portion, and eventually your iPhone 4S or iPad 2 will look like it’s restoring a backup. It will say “Restoring in Progress”. This can be pretty lengthy. Don’t worry, it’s working. Don’t touch your device until completely finished!

Step 4: Once completed, unlock your iPhone if necessary, and you should see an Absinthe icon on the Home screen. You may have to search for it if you have a lot of app icons. Tap the Absinthe icon, and it should load the GreenPois0n site, and will then reboot your device. Once it loads back up, the Cydia icon will have replaced the Absinthe icon.

Step 5: Your iPhone 4S or iPad 2  is now  jailbroken! It took a while, but it was certainly worth the wait. Now all that’s left to do is load Cydia for the first time, and start downloading your favorite jailbreak apps and tweaks.

Enjoy!