In this video, iPodTouchHelping takes you through the steps for unlocking a jailbroken iPhone 3G or 3GS using the software BlackSn0w. For this to work, the iPhone should be jailbroken by Blackra1n on version 3.1.2 firmware. Two methods are demonstrated to accomplish this. The first is done by adding Blackra1n on to your iPhone and installing BlackSn0w as indicated. The second is done by running the Blackra1n app as also demonstrated in the video.