First method:
In order to switch off the tablet hold down the Power key for a short while.
after that, press and hold together Volume Up + Home + Power button for a few seconds.
You may release held keys when the Samsung Logo appears on the screen.
Select "wipe data / factory reset" by using Volume buttons to navigate and Power button to confirm.
In the next step choose "Yes -- delete all user data" to confirm whole operation.
When the Recovery Mode appears again select "reboot system now".
Good job! The hard reset has just been performed.
Ant . .
