Just a little while ago, Apple released iOS 4 (previously known as iPhone OS 4) for all iPhone & iPodTouch devices except iPhone 2G & iPodTouch. If you have a jailbroken iPhone 3G / 3GS you should be able to unlock it using the new version of UltraSn0w 0.93.

If you haven’t downloaded your iPhone’s iOS 4, follow this link to for direct download links – iOS 4 is ready for download. But, hold your horses [Jailbreakers/Unlockers.

iPhone 3G & iPodTouch 2G Follow the below links to Jailbreak

How to Jailbreak iPhone 3G running iOS 4 using redsn0w (Mac) - Updated 06/21/2010

How to Jailbreak iPhone 3G running iOS 4 using redsn0w (Windows) - Updated 06/21/2010

This UltraSn0w version can unlock all the following basebands

04.26.08

05.11.07

05.12.01

05.13.04

One more important thing, make sure your disable 3G before your try to unlock your iPhone. Settings >> General >> Network >> 3G - Disable

Step 1: Launch Cydia

Step 2: Tap on Manage & Tap on Sources

Step 3: Tap on Edit and the Tap on Add

Step 4: Now, in the field add the following repo

http://repo666.ultrasn0w.com

Note: in ultrasn0w its a Zero not a o

Step 5: Now, tap on AddSource and then Tap on Done

Step 6: Now, Tap on the added source "repo666.ultrasn0w.com"

Step 7: Now, look for ultrasn0w 0.93 and select it.

Step 8: Now, Tap on Install and then confirm to complete the installation.

There you have it. You have your iPhone unlocked. Please let us know, your experience with this tutorial.

To know more about iPhone Jailbreak & Unlock,  you can always follow us on twitter @machackpc and/or follow us on Buzz machackpc and/or join our facebook fanpage to keep yourself updated.

Articles you may be interested in

• iOS 4 is ready for download. But, hold your horses [Jailbreakers/Unlockers]
• List of iOS 4 Features (About 100 new features.)
• Unlock is confirmed for iOS 4 with baseband 05.13.04, including iPhone 4
• Jailbreak tool RedSn0w for iOS 4 got few more options added.
• iPhone 2G running a custom firmware similar to iOS 4