As the iPhone 3GS has already been Jailbroken through Purplera1n,  you guys must be waiting for the unlocking software for the iPhone 3GS, which will allow your new iPhone 3GS to be used along with any carrier. Here are the instructions showing how you can unlock your iPhone 3GS.

For successful iPhone 3GS unlock you will need a Jailbroken iPhone 3GS with OS 3.0 firmware, if you have updated your firmware to OS 3.1 or something, this will not work until Dev team updates it with newer revisions.

How to Unlock iPhone 3GS OS 3.0 using Ultrasn0w [ Step by step Instructions]

• Disable 3G on your iPhone 3GS with OS 3.0
• Jailbreak it with Purplera1n
• Run Cydia
• Add Source http://repo666.ultrasn0w.com
• Download/Install the package from Ultrasn0w

The software unlock of the iPhone 3GS OS 3.0 works in the same way as in the iPhone 3G OS 3.0 so the same unlocking software should work with the iPhone 3GS 3.0.

Update on iPhone 3GS unlock

Ultrasn0w has been upgraded to latest version Ultrasn0w 0.9 , it fixes most of the reported bugs. Download it now from Cydia and enjoy error free unlock of your new iPhone 3GS.

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