One of the more convenient security features added in Android 5.0 Lollipop is "smart lock." The feature has you pick a traditional lock screen—like PIN, pattern, or password—but it allows you to skip the security challenge if certain conditions are met. The first two in Lollipop allowed you to add a "Trusted Device," which would skip the lock screen if it you were connected to a certain bluetooth device, and "Trusted Face," which used facial recognition through the front facing camera. Now Google has added a new smart lock: "Trusted Voice," which, as you might have guessed, uses your voice as your password.