Unstructured Supplementary Service Data (USSD) codes are strings of characters primarily used by developers and technicians to troubleshoot smartphones. You can use these codes to learn more about ...

Add Yahoo as a preferred source to see more of our stories on Google. iPhone (iOS 11 or later): Launch the Camera app, frame the QR code, and tap the notification. The Control Center can have a ...

Apple is back at it again with quality control, but this time, it is a hidden QR code on the iPhone's screen that it engraves during production, something the company can only see. This is a form of ...

You’ve probably never seen the QR code printed on your iPhone screen because it’s so microscopic that most people have no idea there’s a QR code there. A new report from The Information details how ...

QR or Quick Response codes are one of the most popular ways to access information on the go. Invented in 1994 and once considered the wave of the future, part of the QR code revival that started in ...