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How to Jailbreak iOS 4.3.1 on iPhone 4 using RedSn0w [Windows]

How to Jailbreak iOS 4.3.1 on iPhone 4 using RedSn0w [Windows]

This time the dev-team simultaneously released jailbreak tools for iOS 4.3 for both Windows as well as Mac users. This tutorial will help you jailbreak iPhone 4 or iPhone 3GS using Redsn0w on Windows. This jailbreak for iOS 4.3.1 is untethered.

This guide is meant for Windows users. If you are a Mac user, you can read our previous guide on How to Jailbreak iOS 4.3 on iPhone 4 using PwnageTool on Mac.

Warning for Ultrasn0w users:

Ultrasn0w has not been updated yet to support unlocking on iOS 4.3.1. So, if you require an unlock right now, please stay away from iOS 4.3.1 as unlock will take some while to arrive. If you do not need an unlock right away, you can follow our guide to safely update iPhone 4 preserving baseband so that you can use Ultrasn0w unlock in the future.

Redsn0w icon

Tools required to Jailbreak iOS 4.3.1 with Redsn0w in Windows:

  • RedSn0w

Latest Firmware

Instructions to Jailbreak iOS 4.3.1 using Redsn0w [Windows]:

If you depend on Ultrasn0w unlock for your iPhone 4 then use our guide to safely update iPhone 4. If you own a factory unlocked iPhone then just launch iTunes and then press Shift+Update and update iPhone to iOS 4.3 by using the firmware file you downloaded above.

Itunes update iphone 4 ios 4 3 1

Once your iPhone 4 or iPhone 3GS has been updated to iOS 4.3.1 quit iTunes and launch Redsn0w v0.9.6rc9 that we downloaded in the beginning.

Untethered jailbreak ios 4 3 1 using redsn0w windows 1

In order to Jailbreak iOS 4.3 with RedSn0w you need to point Redsn0w to the IPSW file. Click on the browse button and select the IPSW file corresponding to your iPhone.

Untethered jailbreak ios 4 3 1 using redsn0w windows 2

After the IPSW has been identified, click on Next to proceed.

Untethered jailbreak ios 4 3 1 using redsn0w windows 3

Untethered jailbreak ios 4 3 1 using redsn0w windows 4

Redsn0w will prepare the jailbreak data. This will take a few minutes to complete.

Untethered jailbreak ios 4 3 1 using redsn0w windows 5

On the next screen, make sure the checkbox beside Install Cydia is ticked and then click on Next.

Untethered jailbreak ios 4 3 1 using redsn0w windows 6

Connect iPhone to your computer and then turn it off. You will now be shown instructions to put the iPhone in DFU mode.

Untethered jailbreak ios 4 3 1 using redsn0w windows 7

Untethered jailbreak ios 4 3 1 using redsn0w windows 9

Once successfully placed into DFU mode your work is done. Sit back while Redsn0w jailbreaks your iPhone. When it says done, click on Finish and wait for iPhone to reboot.

Untethered jailbreak ios 4 3 1 using redsn0w windows 8

You should now have a jailbroken iPhone 4 with iOS 4.3.1 and Cydia installed.

Ios 4 3 1 on iphone 4

Ios 4 3 1 cydia installed

Keep subscribed to us for more iPhone tutorials!

Article by Rajat

Rajat has written 234 articles.

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{ 2 comments… add one }

  • Tharun April 5, 2011, 1:52 pm

    Nice tutorial…well explained..thanks for the info !

  • Adam April 5, 2011, 4:24 pm

    Great guide! It can take a while to reboot after jailbreak.. took about 20 min on my iPhone.

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