How to Untethered iOS 4.2.1 Jailbreak for iPhone on Windows with iOS Sn0wbreeze 2.2

In this guide we see how to untethered jailbreak IOS 4.2.1 on iPad using the Windows application Sn0wbreeze. Sn0wbreeze 2.2 can be defined as “Pwnage Tool for Windows” because of its structure and the type of jailbreak executable program. Developed by iH8sn0w, Sn0wbreeze performs the jailbreak of a number of devices by creating a custom firmware to be restored at a later time, with iTunes.


  • IPhone 3G
  • IPhone 3G
  • IPhone 4
  • IPod Touch 2G
  • IPod Touch 3G
  • IPod nano 4G
  • IPad
  • Apple TV 2G


  • Windows OS (7, Vista, XP);
  • An IOS device (including those in the compatibility list);
  • Original Apple Firmware 4.2.1 (download)
  • Sn0wbreeze 2.2 for Windows (download)

Launch Snowbreeze 2.2 and click OK to the first message that appears. On Windows Vista and 7 may need to run it in Administrator mode.

At this point the screen will show the credits. Close this window by clicking on “Close Credits”. At this point we have to choose one of three modes available.

If you are interested in the jailbreak click on Expert Mode, then click Browse and find the original 4.2.1 firmware on your device saved to your PC.

Select it by double clicking the left mouse button. Sn0wbreeze verify that the firmware you entered is incorrect.

Once you recognize the firmware loaded the following screen appears (you will see the model of device you want to unlock). Now click again on the blue arrow to proceed.

You will be confronted with a page that will allow you to access different functions.

Click on General and uncheck the item Activate The iPad

All other items are optional and serve to enable the backgrounds, multi-tasking and the battery as a percentage of devices that do not natively support these functions. E ‘can also change the system partition dedicated to programs and install Cydia manually SSH.

From the next screen you can add packages and repositories in Cydia and avoid doing it manually via the iPad later. Finish in this case the changes, click on the blue arrow.

At this point we will return automatically to the Home of Sn0wbreeze 2.2. Then click on Build IPSW and then click Next.

The program will begin to create the custom firmware based on parameters you set. And you will be asked if you will like playing Pac Man while waiting or not. Your response, however, will not influence the creation of custom firmware.

That’s it!

Once you are finished you have to put the iPhone into DFU Mode. Sn0wbreeze will show you the steps to follow.

Now iTunes will detect an iPhone in recovery mode. To install the new custom firmware then you have to simultaneously press the SHIFT key on the keyboard and press Restore in iTunes.

Now select the custom firmware you created earlier and wait a few minutes so that the recovery process is completed.

Finished. Now you have your iPhone jailbroken with Ios 4.2.1 updated!

Note: If Pac Man does not work, you probably do not have Flash installed on Internet Explorer. You’ll know yourself, simply by testing the program directly.