How to Jailbreak iPhone 4, iPad, iPod Touch 4G on iOS 4.2.1 (Untethered Beta)


How to Jailbreak iPhone 4, iPad, iPod Touch 4G on iOS 4.2.1 (Untethered Beta)

In the following guide you will learn how to permanently ( Untethered ) jailbreak the iPhone 4, iPad or the iPod Touch 4G, running on iOS 4.2.1. This will be done using the latest version of Redsn0w: 0.9.7b3. With this tool you will be able to keep the jailbreaking ability forever, without having to do this guide again and again, whenever you are rebooting the device. Unlocking is possible, but at this stage is not recommended.

Until now, jailbreaking on the iPhone 4, iPad, iPod Touch 4G and iPhone 3GS ( new bootroom ) with iOS 4.2.1 was only temporary ( tethered ). With the new Dev-Team project, called Redsn0w 0.9.7b3, temporarily has evolved into permanently, but all with a cost. The tool is at the Beta 3 stage and it is not recommended for a general use. In a few weeks the final version will be released and hopefully it will be a stable build. If you want to take the chances, here is what you are facing with the Beta:

  • It only works on a MAC.

  • Cydia must have the iOS 4.2b3 SHSH hashes. To check this simply open Cydia and see if you have 4.2b3 shown, like bellow:

SHSH blobs on Cydia

  • Bluetooth is not working.

  • iPhone 3GS ( new bootroom ) not supported.

  • Access to the iOS 4.2b3 firmware – you need to be an Apple Partner/developer.

If you encounter any unusual bugs or errors, please report them to the official Dev-Team website. The information will be used to patch any holes in the software and release the final version sooner. I strongly advise you to wait for the official version and not to follow the guide bellow. If you read all my words above and still want to try this, let’s go. Don’t forget to back up all of your data: pictures, files, contacts etc.

How to Jailbreak iPhone 4, iPad, iPod Touch 4G on iOS 4.2.1 with Redsn0w 0.9.7b3
  1. You must first jailbreak the iDevice using this guide. If you are already jailbroken-tethered- then skip to step 2.

  2. Download Redsn0w 0.9.7b3 to your desktop and then connect the device to your MAC, using an USB cable.

  3. Download usbmuxd and extract it on the desktop.

  4. Start the Terminal -python-client directory- and type the following commands:

    • chmod +x

    • ./ -t 22:2222

  5. Download the iOS 4.2.1 firmware for your device and save it on the desktop.

  6. Start Redsn0w 0.9.7b3 and browse to the .IPSW file downloaded above. Select it and click open.

  7. Redsn0w should identify the firmware right away. Click Next.

  8. Download the iOS 4.2beta3 firmware for your device and save it on the desktop – we have no links, read above.

  9. On the next screen, select “Jailbreak Monte – untethered” option and then browse to the 4.2b3 .IPSW file previously downloaded.

  10. Power off the device and click Next.

  11. Follow the onscreen instructions to enter DFU mode.

  12. Have a little patience while the iPhone 4, iPad, iPod Touch 4G with iOS 4.2.1 is being jailbroken. The process will end with a reboot and then you are done.

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