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.

Everywhere you look at the South by Southwest conference this week, you see QR codes. The square “quick response” codes turn URLs, vCards, or any kind of text into a jumble of pixels that you can scan ...

Your Android or iPhone can probably already scan QR codes. Here's how to do it no matter what phone you have. When he's not testing the latest phones or phone cameras, Andrew can normally be found ...