If the phone boots normally and working, you can go to
Settings -> Privacy -> Factory data reset -> Reset phone -> Erase everything
to wipe out the phone.
If the phone is frozen, you may press and hold power button for 10-15 seconds for the phone to reboot. You may also try
below steps if it still does not work.
You can dial *2767*3855# in dial pad to factory reset the phone.
- Hold Home + Volume up buttons and press power on. Release the power button when the Samsung logo comes up.
- Select Factory wipe in the menu
- Reboot the phone by selecting reboot in the menu
- Congratulations! You have successfully factory resetted Samsung Galaxy Note N7000