In this how to video, you will learn how to unlock your iPhone 3G 3.0 firmware with Ultrasn0w. First, turn on your device and go to Cydia. Click manage and sources. From here, go to edit and click add. Enter repo666.ultrasn0w.com here and click add source. Once that is done, go back to Cydia. Go to search and look for Ultrasn0w. Click install and confirm to install it. Now you have Ultrasn0w installed. Reboot your iPhone. Next, insert your SIM card. Go to your settings to confirm that the SIM card is installed. You have now unlocked your iPhone.