Your smartphone is full of surprises. There's an app if you want to use your phone as a magnifying glass or scanner. Tap or click here for hidden apps on your smartphone and how to find them.

QR codes are a type of barcode, or scannable pattern, that contain various forms of data, like website links, account information, and phone numbers.

QR codes can be really handy. A grid of seemingly random black-and-white squares can hold enough information to store website URLs, contact information, email addresses, pre-defined SMS text messages, ...