This guide will show you a simple way on :
How to factory reset SAMSUNG Galaxy S Duos 3.
How to wipe all data in SAMSUNG Galaxy S Duos 3.
How to bypass screen lock in SAMSUNG Galaxy S Duos 3.
How to restore defaults in SAMSUNG Galaxy S Duos 3.
All method of master reset SAMSUNG Galaxy S Duos 3.
So Check out how to accomplish hard reset by hardware keys and through android settings. As a result your SAMSUNG Galaxy S Duos 3 will be as new and your core will run faster.