A: If you ever installed this device on other phone/tablet, you can share back the administrative
privilege (QR) from other phone/tablet by using the administrative QR code, please refer to "How to
share administrative privilege to/from other phone/tablet".
Otherwise, you will have to hardware reset the device (please refer to "How do I revert the device to factory default settings") and do the installation again. ( by doing this, all previous access sharing will be invalid and disabled, too)