Updated To GreenPois0n RC6
Finlay GreenPois0n RC5 Untethered Jailbreak for iOS 4.2.1 Released For Windows
These are instructions on how to jailbreak your iPhone 3GS and iPhone 4 using Greenpois0n for Windows. Greenpois0n supports the iOS 4.1 and iOS 4.2.1 firmware. Use Limera1n if you want to jailbreak iOS 4.0, iOS 4.0.1, iOS 4.0.2.
Remember: Do not update to iOS 4.2.1 if you need the unlock. Ultrasn0w does not support that baseband yet. The only exception is the iPhone 4. You can update to iOS 4.2.1 without upgrading your baseband by following this tutorial.
- [Mirror For Mac Version] / RC6
- [Mirror For Linux Version] / Coming Soon
- [Mirror For Windows Version] / RC6
Step One Open your web browser of choice and navigate to http://www.greenpois0n.com. Click the Windows link at the bottom of the screen.
Step Five You will now be instructed on how to place your iPhone into DFU mode. You can get help with this here.
You’ll notice some verbose mode text scrolling on your device.
Step Ten Press to select Cydia then press the large Install Cydia button that appears.
Step Eleven Once Cydia has installed successfully you can remove Loader by pressing the Options button then the large red Remove Loader.app button.
Step Twelve Restart your iPhone then run Cydia. Let it do all the necessary updates then follow our Unlock tutorial if possible for your device.
***A big thanks goes everyone who made this jailbreak possible.