Samsung SGH-T849ZKDTMB - Manual (Page 41)

Memory Card 37
Safe Mode
You can boot your tablet into Safe Mode if you wish to
troubleshoot whether or not added applications are causing
problems with the device. Safe mode will only load basic
system software.
1. Turn off the tablet.
2. Press and hold the power key to boot up your tablet.
3. After the animation starts to display, continually tap the
key until the backlight turns on behind the four
bottom keys.
4. Press and hold the key.
When the Home screen displays, Safe mode displays in the
lower, left corner of the screen.
Rebooting your Tablet
ᮣ Press and hold the power key for at least eight second. The
tablet reboots.