The Dev-Team blog has been updated with a new version 0.9.6b4 redsn0w jailbreak (based on Limera1n bootROM Geohot of burst) for IOS 4.2.1. Unfortunately, owners jailbreak IOS device will not find as easy as browsing a web site. And the 4.2.1 jailbreak is "tied" to the owners of the iPhone 4, IPAD, and new iPhone 3G and iPod touch will have to re-connect to a PC or Mac to boot into a state released each time the device loses power and needs a reboot. You can jailbreak iphone 3gs easily.Those of you who rely on the release ultrasn0w must wait for now -. "Cydia" good advice for anyone not comfortable with terms like "SHSH bubbles" or
In the following devices, redsn0w 0.9.6 jailbreak b4 supports bound:
New 3G iPhone Bootrom
iPod Touch 2G (Model MC)
iPod Touch 3G
4G iPod Touch
NOTE: Those based on a carrier release should stay away from Redsn0w and IOS 4.2.1.
Follow the step by step instructions posted below to jailbreak 4.2.1 with Redsn0w iOS 0.9.6b4:
Step 1: Download IOS 4.2.1 for your version of IOS device.
Step 2: Update and restore firmware 4.2.1 IPSW Ios with the file you just downloaded through iTunes 10.1.
Step 3: Start 0.9.6b4 Ios Redsn0w and point to 4.2 to proceed with the jailbreak.
Step 4: Now select "Install Cydia" and click "Next." Optionally (if available) can also select any other option.
Step 5: Now make sure your device is off and connected to your computer before clicking "Next."
At this stage you are presented with a screen to be quickly hold "Power" button and then while holding the Power button, which will now have to keep "Home" button as well. Now, after the release of a few seconds "Power", but he still drinks "Home" button until the installation begins.
Step 6: Sit and enjoy while redsn0w will do the rest for you. Once done, your iPhone or iPod touch will automatically reboot and you will find the latest jailbreak the iPhone 4.2.1 IOS firmware.For 4, 3G (New Bootrom), iPod touch 4G / 3G / 2G, IPAD ONLY:
Step 7: Now, from here on out, when you want to SSH into your device, you must first run the device in the "been released" on every reboot by using the "Just right now tied Start" option Redsn0w.