How Do I Set a Strong Password on My Smartphone or Tablet?

What?: All of our smartphones and tablet computers can do passcodes, and most of us have a passcode already. What many of us don't know, however, is that the basic passcodes we use on these devices are not as strong as we need them to be. It's actually a pretty achievable project to crack the 4 or 6-digit PIN code or pattern that we set by default on iPhones, iPads, and Android devices. And given the kind of information many of us keep on these devices, it is worth the time and energy to bad guys to try to crack those passcodes. So we need longer ones, but it's not immediately obvious how to actually set a longer passcode...