This guide will show you a simple way on :
how to factory reset SAMSUNG S9.
How to wipe all data in SAMSUNG S9.
How to bypass screen lock in SAMSUNG S9.
How to restore defaults in SAMSUNG S9.
All method of master reset SAMSUNG S9 .
So Check out how to accomplish hard reset by hardware keys and through android settings. As a result your SAMSUNG GALAXY S9 will be as new and your core will run faster.