Office, mobile app. QR, reader instructions Uncategorized May 5, 2021 Forums AndroidCentralLeave a Comment on Office, mobile app. QR, reader instructions How do you use qr code, for reading. Used earlier, scanned the qr code on a letter, the scan just seemed to go up and down as if to be scanning. But that was it what else do you need to do?. Thanks Dave. Sharing is caring!