Do you occasionally leave your phone unattended? If you don’t like the idea that someone might easily be able to use your phone and see everything you’ve stored on it, you can secure it.
Whenever you turn on the phone or restore it from a darkened state, you normally see the lock screen. Its purpose is twofold. First, when the phone is idle, the lock screen appears, providing a bit of privacy from casual observers. Second, you can secure the phone by requiring that a pattern, PIN, password, or face unlock be supplied to clear the lock screen. As with the Home screen wallpaper described earlier in this chapter, you can customize the lock screen wallpaper by choosing a different image to display.