Jailbreak iPhone 4 / 3GS iOS 4.3.1 Untethered with RedSn0w 0.9.6 RC9 [How-to Guide]

These are the steps to jailbreak iPhone 4, iPhone 3GS on iOS 4.3.1 untethered using RedSn0w 0.9.6rc9. RedSn0w 0.9.6 can jailbreak iOS 4.3.1 on iPhone 4, 3GS, iPod Touch 4G, 3G and iPad. Step-by-step jailbreak instructions after the jump…

Important

If you depend on UltraSn0w unlock, STAY AWAY from iOS 4.3.1 and RedSn0w.
UltraSn0w unlockers go for the PwnageTool/Sn0wbreeze Custom firmware (Guides linked at bottom).
iPhone 4 users can update to iOS 4.3.1 while preserving baseband with TinyUmbrella. Here is how to:
Your iPhone 4, iPhone 3GS must be running iOS 4.3.1

Disclaimer: This guide is for educational and information purposes only. Follow the steps below at your own risk. We cannot be held responsible if anything goes wrong.

Let’s untethered jailbreak iPhone 3GS and iPhone 4 iOS 4.3.1 with RedSn0w 0.9.6.

How to Jailbreak iPhone 4, 3GS iOS 4.3.1 untethered with RedSn0w 0.9.6rc

Step 1

Download the required stuff:

Step 2

Restore iOS 4.3.1 on your iPhone 4/iPhone 3GS and keep it connect to your computer via USB.
*You can skip this step if you’re already running iOS 4.3.1/tethered jailbroken iOS 4.3.1.

Step 3

Execute the Redsn0w 0.9.6 rc9 (Download link below)

Step 4

Hit the Browse button and select official iOS 4.3.1 firmware (downloaded in Step 1). RedSn0w will recognize your IPSW file. Then hit Next.

Step 5

Now check mark “Install Cydia” and hit Next.

Step 6

Now make sure your iPhone 4, iPhone 3GS is turned OFF and Plugged in to your computer. Hit Next.

Step 7

Now you’ll be instructed to put your iDevice into DFU Mode. Follow the on screen instructions.

Once you’ve successfully entered into DFU mode, RedSn0w will start jailbreaking iPhone 4 or iPhone 3GS on iOS 4.3.1 untethered. When done! your iPhone 4, iPhone 3GS will be jailbroken untethered on iOS 4.3.1.

If you depend on UltraSn0w unlock or want to use custom firmware created via PwnageTool/Sn0wbreeze, follow the guides linked below: