How do I start my Samsung T959 Galaxy S Vibrant in Safe Mode?
You can boot up your Samsung T959 Galaxy S Vibrant in Safe Mode if you wish to troubleshoot whether or not added applications are causing problems with the Samsung T959 Galaxy S Vibrant. Safe mode will load only basic system software.
Make sure your device is turned off.
Press and hold the Power key to boot up your Samsung T959 Galaxy S Vibrant.
After the start-up animation begins to display, press and hold the Volume down key.
When the lock screen is displayed Safe mode is displayed in the lower-left corner of the screen. To boot your Samsung T959 Galaxy S Vibrant in normal mode again restart your device.
Another way maybe help you: