Welcome here I've got HTC desire, 21 pro 5g, and I'm going to show you how to allow the camera app to scan qr codes at this device. So at first we have to tap on the camera button to open it and for now we are in the standard photo mode from here. Let's go to the right corner to this button. When we pick it, we get access to more modes of this camera and in this device we have the qr code mode. So by just one tab we get access to it, and we can start scanning qr codes by putting them inside this square. So this is really easy here and that's all thanks for watching, subscribe our channel and leave the thumbs up.
Source : HardReset.Info