How to Unlock iPhone OS 3.1.2 on 05.11.07 Baseband with Blacksn0w

Finally the long awaited Blacksn0w has been released by GeoHot. Blacksn0w is the unlock for the latest 05.11.07 baseband, Apart from unlocking iPhone 3G/3GS Firmware 3.1.2  blacksn0w also enable official tethering on iPhone. blackra1n RC3 has been released with hacktivation support, 15 second speed improvement, Tiger+PPC support, and installation of the latest blackra1n.app

Follow this step to Unlock iPhone OS 3.1.2 on 05.11.07 Baseband with Blacksn0w

• Install the latest version of iTunes HERE
• Connect your iPhone to PC/Mac. Go to iTunes and update your iPhone OS to software version 3.1.2
• After the update, you need to jailbreak your iPhone with blackra1n RC3. Download blackra1n for PC and Mac HERE
• Run the blackra1n app (On Windows 7 or Vista, you need to run it on Windows XP compatibility mode) and click on the make it ra1n button.

Follow this step to Unlock iPhone OS 3.1.2 on 05.11.07 Baseband with Blacksn0w

• Install the latest version of iTunes HERE
• Connect your iPhone to PC/Mac. Go to iTunes and update your iPhone OS to software version 3.1.2
• After the update, you need to jailbreak your iPhone with blackra1n RC3. Download blackra1n for PC and Mac HERE
• Run the blackra1n app (On Windows 7 or Vista, you need to run it on Windows XP compatibility mode) and click on the make it ra1n button.

• Wait until your iPhone restarts.
  
• After the jail break, run the blackra1n app on iPhone. Tap on “sn0w” to install blacksn0w that will unlock your iPhone 3G or 3GS running 3.1.2 firmware on 05.11.07 baseband (look screenshot below)