Jailbreak iOS 4.2.1 with Redsn0w
By on November 23rd, 2010

Yesterday, Apple released the highly anticipated iOS 4.2.1 for the iPod Touch, iPhone and the iPad. The iOS4.2 update is a minor one for the iPod Touch and the iPhone but it brings a bucket load of changes for the iPad. With the iOS 4.2.1 update, the iPad gets AirPlay, AirPrint, Game Center and Multi-tasking etcetera.

Today, the iPhone Dev Team has released an updated version of Redsn0w which is capable of jailbreaking users’ iTouch device running on iOS 4.2. The only downside is that the jailbreak is a tethered one which means that users need to jailbreak their iTouch device again when they restart it. However, for the iPhone 3GS (older boot rom), iPhone 3G and the iPod Touch 2G (Non-MC) this jailbreak is an untethered one.

Here are the steps to jailbreak your iTouch device using Redsn0w 0.9.6b4 :

Step 1: First and foremost, users need to update their iTouch device to iOS 4.2.1 using iTunes 10.1. They also need to download Redsn0w from here. You can also directly download iOS 4.2.1 IPSW.

Step 2: After that, users need to fire up Redsn0w and point it to the iOS 4.2.1 IPSW file. Once the IPSW file has been successfully identified by Redsn0w, users need to click on the Next’ button to proceed.

redsn0w Jailbreak iOS 4.2

Step 3: Users then need to select the Install Cydia’ option along with any other feature they would like to use.

redsn0w Jailbreak iOS 4.2 Install Cydia

Before proceeding with the next step, users need to make sure that their iTouch device is switched off and plugged in to the computer.

Step 4: Now, in the next step users need to hold the Power’ button and whilst holding the power button, they need to hold the Home’ button. After around 10 seconds, users need to release the Power’ button whilst still pressing the Home’ button.

redsn0w Jailbreak iOS 4.2 DFU Mode

Step 5: After this, Redsn0w will work its magic and will jailbreak your iTouch device running iOS4.2.1.

This step is only for iPhone 4, iPhone 3GS (newer boot rom), iPod Touch 4G, 3G, 2G and iPad owners.

redsn0w Jailbreak iOS 4.2 Rebooting

Step 6: Since this Redsn0w jailbreak is a tethered one for the above said iTouch devices, users need to use the Just boot tethered right now’ option in Redsn0w every time they restart their iTouch device.

That’s it folks! You have now managed to successfully jailbreak your iTouch device running on iOS4.2.1.

(Source)

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Author: Rajesh Pandey Google Profile for Rajesh Pandey
Rajesh is a 19 year old nerd, currently pursuing B.Com Hons from Bhawanipore college in Kolkata, India. He loves everything tech, especially Android. You can follow him on twitter @ePandu or mail to him at rajesh@techie-buzz.com.

Rajesh Pandey has written and can be contacted at rajesh@techie-buzz.com.
  • Simon

    Redsn0w crashes for me.

 
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