This guide will show you a simple way on :
How to factory reset SAMSUNG Galaxy A9 Pro.
How to wipe all data in SAMSUNG Galaxy A9 Pro.
How to bypass screen lock in SAMSUNG Galaxy A9 Pro.
How to restore defaults in SAMSUNG Galaxy A9 Pro.
All method of master reset SAMSUNG Galaxy A9 Pro.
So Check out how to accomplish hard reset by hardware keys and through android settings. As a result your SAMSUNG Galaxy A9 Pro will be as new and your core will run faster.