Samsung Galaxy Note II / 2 Hard Reset

Power off the Galaxy Note2 N7100. Press and hold both Volume Up + Home+power on. In the recovery menu select wipe data factory reset with Volume button. Press power to confirm.

Reset the Galaxy Note 2 device: press and hold the Power/Reset/Lock key for 10-15 seconds.
Reset you Note II Your N7100 Android device freezes or has fatal errors

If your device freezes or hangs, you may need to close programs or reset the device to regain functionality. If your device is frozen and unresponsive, press and hold the Power key for 10-15 seconds. The device will reboot automatically.

If this does not solve the problem, perform a factory data reset. In Idle mode, open the application list and select