QR codes are popular ways to scan menus, tickets, and apps. Here's how to do it from your Android phone or iPhone, and what the FCC says about it.

Use the built-in camera app on your Android device to scan a quick response (QR) code, or use a code scanner on older models.

Something there is that doesn't love a QR code, but that hasn't stopped leading QR code scanner makers Scan from serving up 25 million copies of their software. The company, which currently ...