How to : Jailbreak your iPhone 3Gs iPhone 4 on 4.2.1 using Greenpois0n

Please note that this guide is for those who are already using FACTORY UNLOCKED devices, or those who do not Rely on an unlock to get their phones to work.

Step one

BACKUP you iPhone in iTunes

Step Two

Restore your iPhone to iOS4.2.1

Step Three

Download GreenPois0n from

Greenpois0n.com

remember you need the RC5

Alternatively you can download it from our MIRROR (mac)

Download Mirror (windows)

Step Four

Double click the downloaded file to extract the archive then double click greenpois0n from the desktop to launch the application

Step Five

Connect your iPhone to the computer, power it off, then click the Jailbreak button

Step Six

You will now be instructed on how to place your iPhone into DFU mode follow the steps carefully.

Step Seven

Once Greenpois0n informs you that it has completed you can release the Home button. Click the Complete button to close the application.

Step Eight

Wait for your device to power on!

You will notice a new Loader application on your Springboard. Tap it to launch.

Tap Cydia and then click install Cydia.

Once Cydia has installed successfully you can remove Loader by pressing the Options button then the red Remove Loader.app button.

Restart your iPhone then run Cydia. Let it do all the necessary updates.

Enjoy your jailbroken iPhone.!