iOS 4.3.1 was already jailbroken with PwnageTool bundles on iPhone 4/3GS, iPad, iPod Touch. This tethered jailbreak is only available for Mac users and Windows users can’t get benefit from it. However, recently released Sn0wbreeze 2.4 beta 1 brings tethered 4.3.1 jailbreak to Windows users.
Before proceeding to jailbreak iPhone 4/3GS on iOS 4.3.1, read the following precautions
Required Tools:
iTunes 10.2.1 for Windows
iOS 4.3.1 for iPhone 4/3GS
Sn0wbreeze 2.4
1: Execute Sn0wbreeze and proceed by clicking Forward button in bottom right corner.
![sn0wbreeze_2_4_b1_1 sn0wbreeze 2 4 b1 1 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_1.jpg)
2: Select the corresponding 4.3.1 firmware for your iPhone.
![sn0wbreeze_2_4_b1_2 sn0wbreeze 2 4 b1 2 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_2.jpg)
![sn0wbreeze_2_4_b1_2b sn0wbreeze 2 4 b1 2b Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_2b.jpg)
3: The selected IPSW file will be identified and verified by Sn0wbreeze.![sn0wbreeze_2_4_b1_3 sn0wbreeze 2 4 b1 3 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_3.jpg)
![sn0wbreeze_2_4_b1_3 sn0wbreeze 2 4 b1 3 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_3.jpg)
4: In next screen, chose “baseband preservation mode” if you rely on unlock. Otherwise select “Simple” or Expert Mode according to your requirements.![sn0wbreeze_2_4_b1_4 sn0wbreeze 2 4 b1 4 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_4.jpg)
![sn0wbreeze_2_4_b1_4 sn0wbreeze 2 4 b1 4 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_4.jpg)
5: Sn0wbreeze will start creating custom firmware and will display “Done” when the firmware has been cooked.![sn0wbreeze_2_4_b1_7 sn0wbreeze 2 4 b1 7 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_7.jpg)
![sn0wbreeze_2_4_b1_7 sn0wbreeze 2 4 b1 7 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_7.jpg)
6: In next step, you will follow the onscreen instruction to get iPhone into DFU mode.
7: When you are in DFU mode, Sn0wbreeze will display a message.![sn0wbreeze_2_4_b1_8 sn0wbreeze 2 4 b1 8 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_8.jpg)
![sn0wbreeze_2_4_b1_8 sn0wbreeze 2 4 b1 8 Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/sn0wbreeze_2_4_b1_8.jpg)
8: Now launch iTunes and select your iPhone from the left sidebar. Now hold “Shift” key and click on “Restore”. Select the custom 4.3.1 firmware just created by Sn0wbreeze.![iTunes_Restore iTunes Restore Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/iTunes_Restore.jpg)
![iTunes_Restore iTunes Restore Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/iTunes_Restore.jpg)
9: iTunes will start restoring your iPhone to custom iOS 4.3.1 and all you have to do is wait. Don’t unplug your iPhone or close iTunes in this process.
Booting into Jailbroken State using iBooty:
As this jailbreak is tethered, you will have to connect with PC every time it has to be reboot. During the process of custom 4.3.1 firmware, Sn0wbreeze will create iBooty folder on desktop.
Execute iBooty and chose your iPhone from drop down menu.![iBooty iBooty Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/iBooty.jpg)
![iBooty iBooty Jailbreak iPhone 4 3GS 4.3.1 on Windows with Sn0wbreeze 2.4 B1 [Tethered]](http://www.crispytech.com/wp-content/uploads/2011/03/iBooty.jpg)
Click “Start” and follow the steps to get iPhone into DFU mode. After reboot, your iPhone will be in jailbroken state.
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