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How To Jailbreak iPhone 4, iPhone 3GS On iOS 4.3.1 Using Redsn0w [Windows / Mac]

April 4th, 2011 04:38 admin Leave a comment Go to comments

Jailbreak iPod Touch On iOS 4.2.1 Redsn0w

Redsn0w is one of the most popular jailbreaking tool developed by the iPhone Dev Team. iPhone Dev team released Redsn0w 0.9.6rc9 earlier today, which allows iPhone 4 and iPhone 3GS users to jailbreak iOS 4.3.1 (untethered).

In this guide, we will take you through the step by step procedure to jailbreak iPhone 4, iPhone 3GS on iOS 4.3.1 using Redsn0w.

Here are some important points to note before you proceed.

  • This guide is meant for iPhone 4 and iPhone 3GS users only. This guide is not meant for iPod Touch and iPad users. iPad 1 users can checkout this step by step guide, while iPod Touch users can checkout this step-by-step guide.
  • Please note that jailbreaking your iPhone may void your warranty and hence proceed with caution and at your own risk.
  • Please do not forget to backup your iPhone before you proceed. You can refer to this post for instructions on how to backup your iPhone.
  • After the jailbreaking process is complete, do not forget to checkout our article on tips to keep your iPhone secure.
  • Please ensure you are running latest version of iTunes i.e. iTunes 10.2.1/iTunes 10.2 or later.

You can follow these step-by-step instructions to jailbreak your iPhone:

Step 1: Download Redsn0w 0.9.6rc9 (Mac and Windows) and save the application in a folder named “Redsn0w” on your desktop.

Step 2: You need to download iOS 4.3.1 firmware file:

iOS 4.3.1 firmware file for iPhone 4 users (iPhone3,1_4.3.1_8G4_Restore.ipsw)

iOS 4.3.1 firmware file for iPhone 3GS users (iPhone2,1_4.3.1_8G4_Restore.ipsw)

Step 3: Double click the Redsn0w zip file and extract the application to the Redsn0w folder.

Step 4: Connect your iPhone to the computer, which should automatically launch iTunes.

Skip steps 5 and 6, if your iPhone has already been upgraded to iOS 4.3.1.

Step 5: From the ‘Devices‘ section on the left pane of iTunes, select your iPhone device. Now, hold down the Shift button (Option button for Mac users) and click the ‘Restore‘ button.

Step 6: Navigate to the Redsn0w folder on the desktop and select the downloaded iOS 4.3.1 firmware file (iPhone 4 users: iPhone3,1_4.3.1_8G4_Restore.ipsw, iPhone 3GS users: iPhone2,1_4.3.1_8G4_Restore.ipsw). Click on the ‘Choose‘ button to let iTunes update your iPhone with the required firmware. You will be asked to setup your iPhone either from a previous backup or setup as a new iPhone, select the backup you want for your device (ideally should be the most recent one). Wait for iTunes to finish.

Step 7: Navigate back to the Redsn0w folder and launch the Redsn0w application. If you’re a Windows XP or Windows 7 user then try running Redsn0w as ‘Administrator’ (right-click on the Redsn0w exe and select ‘Run as an Administrator’).

Step 8: You will be asked to select the corresponding IPSW file. Click on the Browse button and select the iOS 4.3.1 firmware file (iPhone 4 users: iPhone3,1_4.3.1_8G4_Restore.ipsw, iPhone 3GS users: iPhone2,1_4.3.1_8G4_Restore.ipsw).

Step 9: Redsn0w will verify the firmware file and inform you if it has successfully identified it. Click on ‘Next‘ to proceed.

Step 10: Redsn0w will now start preparing the jailbreak data.

Step 11: You will now be prompted to select the jailbreak options you would like. Make sure Cydia is selected and select ‘Next‘ to continue.

Step 12: You will now be prompted to switch OFF your iPhone and plug it to the computer. Follow the instructions and click on ‘Next‘ to move to the next screen:

Step 13: You will now need to put your iPhone into the DFU mode. Redsn0w will take you through the necessary steps:

(a) Hold the Power button on iPhone down for 3 seconds:

(b) Now simultaneously hold the iPhone and keep the two buttons pressed for 10 seconds:

(c) Now release the Power button while keeping the Home button pressed until Redsn0w identifies the device:

Step 14: Your iPhone should reboot now.

Step 15: Redsn0w will now begin uploading the new RAM disk and kernel. Please remember to release the Home button.

Step 16: You will now be notified once the jailbreaking process is complete. Click on the ‘Finish‘ button to exit the application.

Step 17: Your iPhone will reboot once again (which could take approximately 5 minutes). After it has rebooted, your iPhone should be successfully jailbroken. You should find Cydia jailbreak app on your iPhone’s home screen.

Hope this helped. Please don’t forget to let us know how it goes in the comments.

Source: How To Jailbreak iPhone 4, iPhone 3GS On iOS 4.3.1 Using Redsn0w [Windows / Mac]

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