How to Unlock 3.1.2 on iPhone 3GS & iPhone 3G with Blacksn0w
This is a video tutorial on how to unlock an iPhone 3g or iPhone 3gs with Blacksnow. Tap on Cydia and select manage>sources>edit>add and add the source [http://www.blackrain.com]. Now wait for loading to complete. Then tap on blackrain.com>blacksnow>install. You need to install blacksnow to unlock your iPhone 3g or iPhone 3gs. The installation may make a few moments. Once the software is installed to your iPhone 3g or iPhone 3gs, insert your SIM card. Now you can see the service provider's logo at the top left of your screen and this will indicate your phone has been unlocked.