this tool works perfectly with iPhone 3GS and 3G OS phones. Ultrasn0w 0.9 is the latest upgraded version of famous iPhone unlocking tool Ultrasnow. Like Redsnow 0.8 Jailbreaking tool, Dev Team fixed several old bugs in this updated version of Ultrasn0w. You can download Ultransnow 0.9 and unlock your iPhone devices easily. Please Register or Log in to view images To download Ultrasn0w, add this to Cydia http://repo666.ultrasn0w.com and then you can either make a fresh install or upgrade from previous Ultrasnow versions.