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How Can I Unlock My iPhone 3GS 4.2.1 iOS

Recently, the latest firmware iOS 4.2.1 was released along with the jailbreak. The jailbreak is the technique for the iPhone 3GS on iOS 4.2.1 firmware which was made accessible through redsn0w 0.9.6 beta 5 (advancement to baseband 06.15.00).

These are some steps to follow to unlock iPhone 3GS 4.2.1 firmware.

1. Install Jailbreak iPhone 3GS application on iOS 4.2.1.
2. Then open Cydia.



3. Select the” Manage” option which is present at the bottom.
4. Select the option named as “Sources”.
5. Click on the buttons “Edit” and “Add”.
6. Now, you have to add the source address as follows. http://repo666.ultrasn0w.com



7. After addition of source search “ultrasn0w 1.2” in Cydia.
8. You have to install Ultrasn0w 1.2 app so that you can easily unlock iPhone 3GS 4.2.1 firmware.
9. Finally, restart your iPhone 3GS device.

Related posts:

1. Simple Tricks To Unlock My iPhone 3G iOS 4.1
2. With Ultrasnow you can easily unlock your iphone 3G/3GS
3. Unlock My iPhone 4 into iOS 4.1 Firmware To Enable It For Jailbreak
4. Guide to Utilize by Unlocking iPhone through Ultrasnow
5. How Can I Jailbreak My iPhone 3GS 4.1 Firmware