I developed this Android application in connection with my friend daGentooBoy, who was one of the people at XDA forums that figured out where the codes were stored. Note: he was not the only person that worked on this see the forum link below for full list of credits. This Android application is meant for people who want to unlock their Samsung Galaxy S variant phones to work on another carrier. Root is not needed except if using Froyo (android 2.2).

Tested on:

- GT-I9000

- Europe I9000

- T-Mobile Vibrant

- AT&T Captivate

- Bell I9000 Vibrant

Step 1, Get the code:

   Install the app below. When you run the app, it will search for the unlock and unfreeze codes on your phone.

   After it aquires the codes, they will be saved to your sd card in a text file. You can also write them down or email them to yourself with the email button.

Step 2, Enter code:

   Power down the phone

   Put in a SIM card from another carrier

   Power up the phone When it boots up enter the unlock code when asked

This information was adapted from xda-developers forums, so for more information and full credits please visit
http://forum.xda-developers.com/showthread.php?t=761045

Download SGS Unlock v1.0 for Android 2.1 only

Download SGS Unlock for Android 2.2 version (experimental, 2.1 users do not use)
 If you like the app please donate.  Unlock codes on the internet generally go for around $25 this app is provided to you for free.

 Disclaimer: This application was not developed in any way in connection with my employer.  My employer does not endorse this application in any way.  This app is offered as is, I will not be held liable for any damages caused by the use of this application.