1. Turn off your phone, press and hold Power key.
2. Press and hold Power Key + Home + Volume Up simultaneously for about 10 seconds.
3. Release all button when Samsung logo appear on the
screen.
4. And then select “Wipe data / factory reset” using volume up and volume down to
navigate and power button to comfirm.
5. Now
Choose “YES – delete all user data”
6. And then “Reboot
System Now”.
7. Wait until reboot your Samsung Note 2 GT-N7100
and Done!
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If this method didn't work, try this other method below!
"If you have any questions let me know in the comment down below!"