For iPhone users who like to modify the phone, jailbreak it is definitely not a term foreign to the ear. Jailbreak could be anyone. Jailbreak process can be done to overcome the limited ability of the iPhone. How, by installing an application on a computer and transfer them to iPhone.Every time there is an update iOS, iPhone users, iPod Touch and the iPad, many of them are waiting until the jailbreak is available. Though the jailbreak process is not easy even to make the device unusable or jailbreak the device can eliminate warranty.
Apple has just released iOS 4.2.1 GM build to developers and luckily enough, iOS 4.2.1 is vulnerable to Redsn0w 0.9.6 b2 released by iPhone dev team. You can go ahead and jailbreak your iPhone 3G, iPhone 3GS, iPhone 4, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G and iPad running iOS 4.2.1.
Important:
- if you use Ultrasn0w to unlock your phone, should stay away from this update. There's no unlock available at this time for iOS 4.2.1
- Golden Master version is targeted for developers, and buggy. Not recomended for end users.
Pre-requisites:
Jailbreaking iOS 4.2.1
- Open RedSn0w 0.9.6b2, click on "select" & browse for iOS 4.1. When the firmware is identified, it will start execution.
- DONT select "Install Cydia" and then click Next.
- Next select the tweaks you wish to have and hit next. Redsn0w will patch and install some files to your iDevice.
- Follow the onscreen instructions to put your iDevice in DFU mode when prompted and your device will be properly jailbreak in seconds.
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