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You don't need your phone to open a QR code. You probably already know how to scan a QR code with your phone. It's simple enough: just open the camera app, point your phone at the code, and tap ...
In this article we will answer the question: how do you scan a QR code. Here's how to scan QR codes, whether you have an Android or iOS operating system.
Though we might laugh about projecting a QR code on one computer to scan it with another, that scenario is actually more applicable to the real world than you might think.
QR codes are a close cousin of the bar codes on product packaging that cashiers scan with infrared scanners to let the checkout computer know what products are being purchased.