The Chronic Dev Team released GreenPois0n a few days ago which allows users to jailbreak iPhone 3GS, iPhone 4, iPad and iPod Touch 3G/4G. Support for Apple TV and iPod Touch 2G is also on the cards. The GreenPois0n jailbreak is based on the same boot rom exploit as the one used by Geohot in Limera1n. The Chronic Dev Team preserved the SHAtterexploit for future as they did not want Apple to fix two boot rom exploits in one update and thus give them an edge in this cat-and-mouse’ game.
Users who are looking to jailbreak their iTouch device using GreenPois0n should follow the instructions below. However, before proceeding with this jailbreaking process, users should make sure that they do not update their phone to iOS4.1 using iTunes. By doing so, they will update their baseband, thus losing the network unlock for the time being. They are recommended to use TinyUmbrella to update their iTouch to iOS4.1 without updating the baseband.
Here are the steps to jailbreak iPhone 3GS, iPhone 4, iPod Touch 3G/4G and iPad :
Step 1) Users should first download GreenPois0n from here. After starting the program, switch off your iTouch device and connect it to your computer’s USB port. After that, press the Prepare to Jailbreak (DFU)’ in GreenPois0n. Users should make sure that iTunes is not running in the background.
Step 2) After that, users need to hold down the Sleep button for 2 seconds. After that while they continue holding the Sleep button, they should press the Home button as well for another 10 seconds. Then they should release the Sleep button whilst holding the Home button for another 15 seconds.
Step 3) Once your iTouch has entered the DFU mode, GreenPois0n will show the Jailbreak’ button. Press the Jailbreak’ button and let GreenPois0n inject its Pois0n on your iTouch. Once the jailbreak is complete, your iTouch device will automatically start up.
Step 4) The final step is to start the Loader’ application found on your iTouch device and install Cydia.
That’s it! Your iTouch is now successfully jailbroken with Cydia installed as well.