How to Jailbreak iOS 4.3.1 Untethered with Redsn0w


How to Jailbreak iOS 4.3.1 Untethered with Redsn0w

In the following guide you will learn how to untethered jailbreak iOS 4.3.1, using Redsn0w 0.9.6rc9. This guide works for iPhone 3GS, iPhone 4 ( the GSM version, not CDMA – Verizon ), iPod Touch 3G / 4G and for the original iPad. iPad 2 is currently out of the question. Unfortunately, unlocking with Ultrasn0w is yet impossible. Developers announced that in a couple of days they will update Ultrasn0w and everything should be OK. This works for PC / Windows and MAC OS X users.

The untethered jailbreaking process is possible on iOS 4.3.1 due to an exploit discovered by Stefan Esser, also known as i0n1c. For those who want to know a little bit about this valuable member of the jailbreaking community, he is a German iOS security developer, who debuted on the web by implementing the antid0te framework.

Wondering why this won’t work for the CDMA Verizon iPhone / iPad 2? Well, in the first case, the Verizon iPhone is stuck on iOS 4.2.6, an unexploited version until now. The iPad 2 is invulnerable to limera1n and Shatter exploits, making jailbreaking possible only with the help of iBoot. If you are a proud owner of the second iPad version, at this moment you will only have to rely on tethered jailbreaking.

As for unlocking iOS 4.3.1 afterwards, this will be only possible in a couple of days. We mentioned above that Ultrasn0w is not yet capable of handling such job. When the iPhone-Dev team will update it, you can only use it after following this guide, or the one with PwnageTool / Sn0wBreeze. When this will be possible, a how to link will be available at the end of this guide.

Jailbreaking iOS 4.3.1 untethered uses the same steps for PC / Windows and MAC OS X users. The instructions are available just below, along with download links to all tools needed. Also, the classic USB cord will be needed, to connect the iPhone 3GS / 4, iPod Touch 3G / 4G or iPad to your console.

iOS 4.3.1 pwned

How to Jailbreak iOS 4.3.1 Untethered with Redsn0w ( PC / MAC )
  1. Download the stock iOS 4.3.1 firmware and connect the iDevice to the computer.

  2. Start iTunes and once the terminal has been detected, press the “Shift” / “Option” key and click on restore. Browse to the .ipsw file we previously downloaded and select it. This will return the iDevice to the stock iOS 4.3.1 version so, you will lose unlocking.

  3. Download Redsn0w 0.9.6rc9 ( or a newer version ) and start the tool.

  4. Now click on “Browse” and select the stock iOS 4.3.1 file.

  5. Wait for Redsn0w to acknowledge the file and then click on Next. Some packages will be downloaded, meaning you will have to wait a bit.

  6. When you arrive at the screen below, choose what you want to install and click Next. Installing Cydia is a mandatory option; everything else will just slow your device.

    Redsn0w screen

  7. Turn off the device.

  8. Follow the on-screen instructions to reach DFU mode.

  9. Click Next and have patience. Redsn0w will finish jailbreaking iOS 4.3.1, in an untethered manner.


  • If you are using a PC and you see the “Waiting to reboot” message for more than 20 seconds, re-plug the USB cable. If this does not work, try using another USB port. Don’t close Redsn0w while doing these.

Unlocking Status: Not ready yet. When possible, we will post a link in this section.

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