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