Scanning A QR Code That's Already On Your Phone Is Actually Simple - Here's How

On iPhone, open the saved QR code in Photos and tap and hold it. On Android, open it in Google Photos and tap Search to scan ...
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You can easily scan QR codes that are already on your phone

You probably think you need to use your smartphone's camera to scan a QR code, right? That's not the case — it's entirely possible (and super-easy) to scan a "Quick-Response" code that's already saved ...
Android Authority

Google starts rolling out QR code-based Quick Share transfers between Android and iPhone

Google has started rolling out a new Quick Share feature that lets Android users share files with iPhones using QR codes. iPhone users can scan the QR code through the Camera app, after which the file ...