After the drama that happened over the weekend between Geohot and the Chronic Dev-Team it seems that much of the dust has settled, and the Dev-Team had to retool their jailbreak to use Geohot’s exploit rather than their SHAtter exploit.
Today, the Chronic Dev-Team has released the slightly modified version of their Greenpois0n jailbreak, which now makes use of Geohot’s exploit. Furthermore, it seems that the two parties have made amends.
Now, it’s time to learn how to jailbreak your iOS4.1 device. Note that this jailbreak is currently limited to Windows computers:
Two things to get out of the way first:
1) First you will want to run TinyUmbrella so that you can backup the SHSH Blobs. We have some information on that here.
2) Backup your device in iTunes, Backup your device in iTunes
3) Read comments on Chronic Dev-Team blog, so you understand the risks
Now for the Jailbreaking:
1) Go to the Greenpois0n website: http://www.greenpois0n.com
2) Once again, the Mac version is not currently available, so download the Windows version Zip file.
3) Unzip the file.
4) Start Greenpois0n
5) Take your device into DFU (Device Firmware Update) mode. Doing so isn’t overly difficult, but it can be a little tricky.
Turn off your device and it into your computer.
Timing is everything, so make sure you have a timer.
a) Hold Home and Sleep Buttons for 10 seconds
b) After 10 seconds release Sleep Button
c) Continue Holding Home Button for 10 more seconds
If you performed the steps above correctly you will see this message in iTunes:
If not, repeat the steps above again – timing is everything.
Know that those same directions are explained on within the Greenpois0n tool:
If you fail to put your device into DFU mode you will get a message prompting you to try again. Remember, timing is everything here. It can be tricky.
6) Once you successfully bring your device into DFU mode you will get jailbreak option:
7) Click on the “Jailbreak!” button and wait for the progress bar.
If your jailbreak worked, you will get a message saying Jailbreak Successful–If not, you will get Jailbreak Failed message.
UPDATED GUIDE for iOS 4.2 Jailbreak: iPhone 4.2 jailbreak: How to Jailbreak iPhone 4.2 or iPod Touch With RedSn0w on iOS 4.2