Thanks for your feedback.
!Before pairing the scanner to the phone, it is always good to factory reset the scanner to put it into a clean state. If the scanner is currently connecting to a phone, please make sure you disconnect it before you do factory reset. The easy way to disconnect scanner from a phone is to turn off the bluetooth on the phone as picture below.
*Some Android devices may have ‘Settings’ on the Home screen, or have it accessible through a ‘Menu’ button on the bottom of the device itself.