Samsung Galaxy Core I8260 Hard Reset
- Press and hold Volume UP + Home + Power Key.
- Wait until you see the Android logo then release all the buttons.
- Now you see Recovery Options.
- Now Select wipe data / factory reset with volume down key.
- Press power key to confirm.
- Now select Yes - Delete all user data with volume down key
- Press Power key to confirm.
- After format all user data press power key to reboot device.