There are a number of potential reasons why your Android device might not be scanning a QR code properly.

If your Android device is not scanning a QR code, make sure the code is properly framed on your screen.
Cleaning your camera lens and getting better lighting on the code are other potential solutions.
You can also try using Google Lens or a third-party QR code app. 

QR codes have been around for a long time, but it seems like they’ve recently found new, heightened popularity. Many restaurants, for example, have switched to leaving a QR code at the table so you can read the menu on your phone rather than printer paper. 

That’s great, most of the time. But what happens when your Android phone won’t scan a QR code? There are a handful of ways to quickly troubleshoot and try to solve this problem. 

Center the QR code on the screen

Often, your phone might not scan the QR code because of how you’re trying to position your phone. Start by opening the camera app on your Android phone — whether that is the Google Camera app found in Android OS devices or a custom camera app. Center the QR code squarely in the frame, being sure the code is at the center of the viewfinder. Wait a few moments, and you should see the option to open the page associated with the code. 

Center the QR code on your screen, and make sure it’s in focus.

Check your lighting and distance

It’s also possible that you are too close, too far, or trying to connect with insufficient lighting. Make sure that the QR code is focused in the frame. If the camera is having difficulty identifying the code, move closer or farther to allow the lens to focus, and make sure the QR code is lit well enough for the camera to read it properly. Move it into better lighting if needed, or have someone else shine their phone’s flashlight. 

Clean the lens

It’s not just being too close or far from the QR code that can keep your phone from reading it properly; the camera lens is also susceptible to smudges and other grime. Give it a quick wipe (ideally with a microfiber cloth) to let the camera see the code better. 

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Source:: Business Insider


7 ways to troubleshoot if your Android device is not scanning a QR code

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