How To Jailbreak iOS 4.2.1 With Redsn0w 0.9.6b4 For iPhone / iPad / iPod Touch


22.11.2010

How To Jailbreak iOS 4.2.1 With Redsn0w 0.9.6b4 For iPhone / iPad / iPod Touch

The iOS 4.2.1 has been released by Apple yesterday and the guys that are part of the iPhone Dev Team managed to jailbreak the iOS 4.2.1 already. And the best thing about this iOS 4.2.1 jailbreak is that it works. The jailbreak for iOS 4.2.1 can be done with the Redsn0w 0.9.6b4 tool and with a working edition of Cydia and Mobile Substrate. This guide works for all the iOS 4.2.1 Apple gadgets.

The Redsn0w 0.9.6b4 is based and uses the Geohot Limera1n bootrom exploit, that has already been used to crack all the Apple devices released and which are using the Apple iOS. The Apple devices supported by the Redsn0w 0.9.6b4 are the following models: iPhone 3GS with the new bootrom, iPad, iPod Touch 2G MG Model, iPod Touch 3G, iPod Touch 4G and the iPhone 4 is supported, obviously.

The Redsn0w 0.9.6b4 jailbreak is a thethered edition, which means that you will have to boot the device into a Jailbroken state, every time you restart / reboot the device. So, if you wish to learn how to jailbreak iOS 4.2.1 Finale version with the Redsn0w 0.9.6b4 jailbreaking utility, you should follow the instructions below. But, before you go ahead and jailbreak your iOS device, you need to know a few things:

  1. First thing that you need to know is that if your device is carrier unlocked, then you shouldn’t install the iOS 4.2.1 and neither using the Redsn0w tool.

  2. Second, you will have to download the applications needed for you to jailbreak your iOS 4.2.1 device:

  • Download the iOS 4.2.1 for iPad, iPod Touch and iPhone 3G, 3GS and 4 from here.

  • Download the Redsn0w 0.9.6b4 for Windows PC from here.

  • Download the Redsn0w 0.9.6b4 for Mac from here.

  • Download iTunes 10.1 for Mac and Windows from here.

Here’s the steps you need to follow in order to learn How To Jailbreak iOS 4.2.1 Final Edition With Redsn0w 0.9.6b4:

  1. First thing you need to do, is to download the iOS 4.2.1 Final edition corresponding for Apple iOS device. you currently own.

  2. Now you to Update or Restore to the iOS 4.2.1 with the IPSW file that you grabbed with the iTunes 10.1 application.

  3. Now open Redsn0w 0.9.6b4 and select the iOS 4.2.1 edition in order to start the jailbreak operation.

  4. Now you should see a screen with various options, select ‘Install Cydia’ and hit the NEXT button.

  5. Now  you need to make sure that your iOS 4.2.1 Apple device is turned OFF and plugged into the PC. Now you should see a menu which tells you to hold pressed the Power button for a few seconds, also while you are holding Power you need to press the Home button, as well. After a few seconds have passed, you need to release the Power button, while you keep the Home button pressed, until Redsn0w starts the installation process.

  6. Now Redsn0w will start doing all the work, which means that you should simply for it to complete its job. After Redsn0w finishes the work, your Apple iOS 4.2.1 device will automatically restart and it will boot up with the iOS 4.2.1 firmware.

  7. Also, from now on you will to open your iPhone 3GS with new bootrom / 3GS / iPod Touch 2G / 3G / 4G / iPad in their jailbroken state, every time you reboot / restart the iOS 4.2.1 device. You can do this, by selecting the ‘Just boot tethered right now’ setting in the redsn0w application, obviously the iOS 4.2.1 device needs to be connected to your computer, for it to start in its jailbroken state.

I hope that you found this guide helpful and that you managed to successfully jailbreak iOS 4.2.1 with Redsn0w 0.9.6.4 on your iPhone, iPod Touch or iPad. Feel free to post any questions in our comments field.

Redsn0w 0.9.6b4 Jailbreak for iPhone, iPad, iPod Touch Running iOS 4.2.1

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