This guide will show you a simple way on :
How to factory reset SAMSUNG I9500 Galaxy S4.
How to wipe all data in SAMSUNG I9500 Galaxy S4.
How to bypass screen lock in SAMSUNG I9500 Galaxy S4.
How to restore defaults in SAMSUNG I9500 Galaxy S4.
All method of master reset SAMSUNG I9500 Galaxy S4.
So Check out how to accomplish hard reset by hardware keys and through android settings. As a result your SAMSUNG I9500 Galaxy S4 will be as new and your core will run faster.