Unlock the iPhone 3GS Using UltraSn0w

These are instructions on how to unlock the iPhone 3G and iPhone 3GS for use with any GSM cellphone carrier using UltraSn0w.

Before you can follow these instructions you must have a jailbroken iPhone and you must be on the 04.26.08 baseband(modem firmware). This means that you must be running the 3.0 firmware and have used PwnageTool or RedSn0w to jailbreak.

If you are on T-Mobile remember to turn off 3G before starting…

Step One

Press to launch Cydia Installer from your SpringBoard.

Step Two

Press to select the Manage tab at the bottom of the screen.

Step Three

Press to select the large Sources button

Step Four

Press the Edit button at the top right of the screen.

Step Five

Press the Add button at the top left of the screen.

Step Six

Enter http://repo666.ultrasn0w.com/ as the source url and press the Add
Source button.

Step Seven

Once the source has been added press the large Return to Cydia button.

Step Eight

Press the Done button at the top right of the screen.

Step Nine

Press to select repo666.ultrasn0w.com from the list of user entered sources.

Step Ten

Press to select ultrasn0w from the list of packages

Step Eleven

Press the Install button at the top right of the screen.

Step Twelve

Press the Confirm button at the top right of the screen.

Step Thirteen

After installation completes successfully press the large Return to Cydia
button.

Step Fourteen

Now press the Home button then power off and power on the iPhone. You
do this by holding down the power button for 3 seconds then moving the power
slider that appears to the right. Press the power button again to turn on the
phone.