Redsn0w has been updated to bring jailbreak support for the newly released final version of iOS 4 for iPhone 3G and iPod touch 2G. Available for both Windows and Mac, redsn0w jailbreak tool additionally also enables options for multitasking and background wallpapers on iPhone 3G and iPod touch 2G which otherwise are disabled by Apple.
Redsn0w beta has been updated to hacktivate iOS 4.0 for iPhone3G (in addition to jailbreaking the iPhone3G and iPod Touch 2G).
For now, the redsn0w beta release supports only the iPhone3G and iPod Touch 2G at today’s 4.0. It’s still a beta, so you’ll need to let Cydia reorganize, reload, and update after using redsn0w.
Follow the step by step guide posted below to jailbreak your iPhone and iPod touch using Redsn0w:
Step 1: Download iOS 4 (final version) for your version of iPhone and iPod touch. Download links are posted here.
Step 2: Update to this latest firmware using the iOS file you just downloaded via iTunes 9.2.
Step 3: Start Redsn0w 0.9.5b5-3 (download here) and point it to the original iOS 4 firmware file to proceed.
Step 4: Now select “Install Cydia” and click “Next”.
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.
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 firmware.
If you notice a blank white icon for Cydia with no sources. Go to the Sources panel and add http://apt.saurik.com/cydia-3.7 repo. Now restart your phone and you should see the regular standard Cydia logo with all the sources now.
How to Unlock 05.13.04, 05.12.01 to 04.26.08 on iOS 4 Using Ultrasn0w
Follow the complete step by step guide posted here to unlock iPhone 3G, on iOS 4, on any baseband using Ultrasn0w 0.93.
Disclaimer: This guide is for testing & educational purposes only. I’m not responsible for any loss of important data or malfunctioning of your iPhone.