The following guide will help Windows users to jailbreak iPhone 4, 3GS, iPod Touch 4G, 3G , iPad over iOS 4.2.1 with Greenpois0n RC5. So, continue reading after the break.

Check out:
Jailbreak iPad 4.2.1 with Greenpois0n RC5 [Mac]Jailbreak iPod Touch 4G, 3G Untethered on iOS 4.2.1 with Greenpois0n RC5 [Mac] Jailbreak iPhone 4, 3GS Untethered on iOS 4.2.1 with Greenpois0n RC5 [Mac]


If your iDevice on iOS 4.2.1 is already jailbroken through iPhone Dev Team’s jailbreak tool then first restore it to iOS 4.2.1 firmware.

Jailbreak iPhone 4/3GS, iPod Touch 4G/3G, iPad Untethered on iOS 4.2.1 with Greenpois0n RC5 [Windows]

Step 1

Create a new folder on your PC’s desktop, download Greenpois0n RC5 for Windows and keep it in your created folder

Step 2

Open your new folder, unzip the downloaded gp_win, then double click on Greenpois0n.exe file

Step 3

Attach your iDevice to system through USB cable, click on Prepare to Jailbreak (DFU) button on Greenpois0n screen

Step 4

Greenpois0n will instruct you to put your iDevice into DFU Mode, so follow those instructions carefully

Step 5

Once your iDevice enter into DFU mode, click on Jailbreak! button, immediately jailbreak process will get start

Step 6

On completion click on Quit button

Step 7

After restart of your iDevice Loader app icon will be available on Springboard, so tap on it to launch that

Step 8

Select Cydia and tap on Install Cydia button

Step 9

When Cydia will be installed it ask to remove from your iDevice, so tap on Remove button and reboot your device by pressing Home button

Step 10

You will find Cydia icon sitting on Springboard

Enjoy, you have successfully jailbroken your iDevice over iOS 4.2.1 with Greenpois0n RC5 on Windows.

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