CAUTION: "DO NOT" complete a Master Reset when the unit is in the process of completing a firmware update as this may damage your Fly12. A Master Reset should only be completed when instructed.
In the event that a master reset is required, the reset button is located within the small cut out as illustrated. Carefully, using a fine object, press the reset button to perform the reset. You will know that this is done correctly as you will feel the reset button being depressed.