iPhone iOS 4.2.1 GM Jailbreak with Redsnow 0.9.6 b2 on iPhone 4, 3G, 3GS and iPod

Redsnow 0.9.6 b2 which is based on GeoHot’s Limera1n exploit can jailbreak iPhone IOS 4.2.1 GM.

Software  0.9.6 b2 can unlock iPhone  4.2.1, iPhone 3GS, iPhone 3G, iPod Touch 4G, iPod Touch 3G and iPod Touch 2G on  4.2.1. iPad is not yet supported by this unlock but you can use the PwnageTool to jailbreak ios 4.

But there is one problem that Apple has changed some private APIs used by Cydia and due to which Cydia crashes when you try to start it. Cydia for ver  4.2.x is almost ready and the iPhone Dev Team is waiting for the final and public build of ver 4.2.1 before they release it. As you get the full root access after you jailbreak your idevice, so you can also install the hack apps via SSH.

Here is the step by step guide to hack ver 4.2.1 on iPhone and iPod Touch version with Redsn0w:

Step 1: Download ios 4.2.1 GM (links to downloads or download pages are listed at the bottom of this post).

Step 2: Download ver 4.1 final version 

Step 3: Download Redsnow 0.9.6 b2 for use in this tutorial.

Step 4: Using the iTunes 10.1, update/restore your phone to ios 4.2.1 GM downloaded in step 1 .

Step 5: Start the Redsnow hack tool and open the ios 4.1 in it to start the hacking process. (Please make it sure that you selected the ios 4.1 IPSW file in this step).

Step 6: Press the Next button after it identifies the IPSW file successfully.

Step 7: Now check the Install Cydia Option. You can also select any other option if available.

Step 8: Switch off your phone and connect it with the PC before you proceed.

Step 9: Follow the Software on-screen instructions to put the iPhone into DFU mode.

Step 10: Wait a few seconds for program to do its thing. After you receive the DONE message, close Redsn0w and enjoy hacked iPhone ver  4.2.1.

Jailbreak you iPhone  4.2.1 Today





Downloads :

• Download Jailbreak  4.2.1 GM Release
• Download iTunes 10.1
• Download Redsn0w 0.9.6 b2

 Direct Download links Firmware:

• iPhones 4
• Phone 3GS
• iPhone 3G
• iPod touch 2G
• iPod touch 3G
• iPod touch 4G

Note: If you rely on unlock, don’t update you device to iPhone 4.2.1 otherwise you’ll lose carrier unlock and there is no unlock available for iOS 4.1 and above yet.


 Disclaimer: This guide is for testing and educational purpose only. Use it at your own risk. This site will not be responsible for any type of damage.


source:  http://www.shoutpedia.com/jailbreak-ios-4.2.1-with-redsnow-0.9.6-b2-6893/

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Posted in: Apple mobile repair and Jailbreak