How to Jailbreak iOS 4.0.1 with Redsn0w [Guide]

iOS 4.0.1 has been released for iPhone 4, 3GS and 3G. While the iPhone 4 and 3GS users will have to wait for a new jailbreak tool, iPhone 3G can go ahead and jailbreak their phone on iOS 4.0.1 using Redsn0w 0.9.5b5-5. Again, this is strictly for iPhone 3G only. All other iOS based devices will be jailbreakable once Comex releases his new jailbreak tool.

Jailbreak iOS 4.0.1

Step 1: Download iOS 4.0.1 for your version of iPhone. Download links are posted here.

Step 2: Update to this latest firmware using the IPSW file you just downloaded via iTunes 9.2.

Step 3: Start Redsn0w 0.9.5b5-5 (download link given below) and point it to iOS 4 (Final Version), and not iOS 4.0.1 firmware file to proceed with the jailbreak.

Jailbreak iPhone OS 4

Step 4: Now select “Install Cydia” and click “Next”.

Jailbreak iPhone 4.0

Step 5: Now make sure your device is both OFF and PLUGGED IN to the computer before you click “Next”.

Step 6: Connect your device in recovery mode by pressing the Power and buttons continuously.

Jailbreak iPhone 4.0 Beta

At this stage you will be presented with a screen where you will have to quickly hold “Power” button and then while holding the “Power” button, you will now have to hold “Home” button too. Now after few seconds release “Power” button but keep holding “Home” button until installation begins.

Step 7: Sit back and enjoy while redsn0w will do all the rest for you. Once done, your iPhone and/or iPod touch will restart automatically and you will find it jailbroken on the latest iOS 4.0.1 firmware.

How to Unlock 05.13.04, 05.12.01 to 04.26.08 on iOS 4.0.1 Using Ultrasn0w

Follow the complete step by step guide posted here to unlock iPhone 3G, on iOS 4.0.1, on any baseband using Ultrasn0w 0.93.

Download iOS 4.0.1 for iPhone 3G
Download Redsn0w 0.9.5b5-5 for Mac
Download Redsn0w 0.9.5b5-5 for Windows

Disclaimer: This guide is for testing & educational purposes only. I’m not responsible for any loss of important data or malfunctioning of your iPhone.

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