For those of you who are beholden to one carrier and locked to your Samsung Galaxy S device, fear not as XDA forum member helroz has written an app to unlock your device for you!
Galaxy S unlock is free and can unlock other variants of the popular line of Samsung Android devices.
In order to run the app, you’ll need to be rooted with BusyBox and have an active internet connection. The dev states that the app has been tested as working for all Galaxy S devices sold with Android 2.1.
To find out where to download the app and for links to full instructions, visit the application thread._________