They couldn’t run Angry Birds, but traditional telephones had one thing today’s smartphones lack: utter simplicity. Buying one was easy: Red or white? Rotary or push button? Using it a breeze: Pick up, dial, speak. Smartphones now on the market are pocket-size computers, and of course, that’s been a boon to both work and play. Send a file? Check. Review a document? No problem. Check in for tonight’s flight? Done. But as they grow ever more capable, smartphones bring some of the same challenges as computers: namely, how to get the most out of them while avoiding any pitfalls. For all-too-many users, that’s a goal they don’t quite achieve. What follows is a look at 10 common smartphone mistakes —and how to avoid them.