Do you want to know how to scan qr codes using an android smart phone? I am using a Samsung S9 in this video. Go to your camera settings and there should be an option for QR Codes. Make sure this setting is turned on. It maybe in a different location and it maybe turned on by default. With the camera simply go over the QR code and a link should display on the bottom of the screen. Tap it and it will bring you to the app, website, wifi network etc...