1.Ensure you have upgraded to iPhone OS 3.0 2.Jailbreak your iPhone 3G using redsn0w or PwnageTool (this will also install Cydia/Icy) 3.Run Cydia or Icy 4.Please add the repo repo666.ultrasn0w.com to Cydia or icy 5.Search for ‘ultrasn0w’ in cydia or icy and install ultrasn0w 6.Reboot your iPhone 3G 7.T-Mobile USA users should disable 3G before using ultrasn0w 8.Enjoy