Chronic Dev Team recently released Greenpois0n jailbreak tool (untethered) for windows that lets you jailbreak iOS 4.1 firmware on your iPhone 4, iPhone 3GS, iPod Touch 4G, iPod Touch 3G and iPad 3.2.2. Follow the simple steps listed below on how to jailbreak iPhone 4, iPhone 3GS on iOS 4.1 using Greenpois0n.
How to Jailbreak iOS 4.1 iPhone 4, 3GS with Greenpois0n
Step 1: Download Greenpois0n [Link].
Step 2: Once the download is complete, move the gp_win_rc2.zip on your desktop and unzip it.
Step 3: Open folder and double click Greenpois0n.exe to launch it.
Step 4: Click on the button ‘Prepare to Jailbreak (DFU)’.
Step 5: Greenpois0n will display the instructions to put the device in DFU Mode
You will be asked to press and hold the sleep button for 2 seconds.
Continue holding sleep; press and hold home for 10 seconds.
Release sleep button; continue holding home for 15 seconds.
Step 6: Once your iPhone 4, iPhone 3GS is in DFU mode, click the Jailbreak button.
Step 7: Greenpois0n will now jailbreak your iPhone 4 on iOS 4.1.
Step 8: Click the Quit button once the software application has completed.
Step 9: After the iPhone 4 restarts you’ll notice a new Loader app on your Springboard, entitled “Greenpois0n”. Press to launch it.
Step 10: Press to select Cydia then press the large Install Cydia button that appears.
Step 11: Once Cydia has installed successfully on your iPhone 4, you will be prompted if you want to remove Loader from your device. Press the Remove button then press the Home button. Your iPhone 4 will now reboot.
Voila, you have successfully jailbroken iPhone 4, iPhone 3GS running on latest firmware iOS 4.1
Greenpois0n uses geohot’s bootrom USB exploit used in limera1n to jailbreak the devices. The team has not used SHAtter exploit for the wellbeing of jailbreaking community for future. For all future jailbreak and unlock software releases, please follow us on Twitter or become a Facebook fan. You may also like to check out more on iPhone Jailbreak and iPhone unlock.