How to Reset on Samsung Captivate (SGH-I897) to Factory Setting
From this menu you can reset your phone and sound settings to the factory default settings. Please ensure any additional installed programs and/or user data have been backed up before a hard reset is performed.
1From the Home screen, touch APPLICATION ➔ Settings ➔ Privacy.
Touch Factory data reset, enter your password > select Yes to confirm.
The phone resets to the factory default settings automatically and when finished displays the Home screen.
Warning!: Performing a Factory data reset will erase all data from your phone, including your Google account, system and application data and settings, and downloaded applications. It will not erase current system software and bundled applications or files on your SD card such as music or photos.