You Can Easily Scan QR Codes That Are Already On Your Phone

Android and iOS both have built-in tools to easily open QR codes from screenshots.
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How to scan a QR code on iPhone and Android

You’ll be a scanner in no time with this guide to getting the all-conquering QR codes ...
AOL

How Do You Scan A QR Code That's Already On Your Phone's Screen? It's Surprisingly Easy

QR codes, short for Quick-Response codes, are pretty neat. You scan the code using your device's camera, which picks up embedded information, often to share details or direct you to a website. The ...
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Google's quietly pushing a surprising new QR scanner UI to Android phones

Google is rolling out the redesigned Android QR scanner UI again after briefly pulling the update. The refreshed QR scanner comes via Google Play Services 25.46.32, though many users still haven't ...