This guide will show you a simple way on :
How to factory reset SAMSUNG Galaxy Gio S5660.
How to wipe all data in SAMSUNG Galaxy Gio S5660.
How to bypass screen lock in SAMSUNG Galaxy Gio S5660.
How to restore defaults in SAMSUNG Galaxy Gio S5660.
All method of master reset SAMSUNG Galaxy Gio S5660 .
So Check out how to accomplish hard reset by hardware keys and through android settings. As a result your SAMSUNG Galaxy Gio S5660 will be as new and your core will run faster.