User Guide
Page 76
...lock to train Droid DNA by HTC is locked. You can also tap Improve face matching on the Security screen to use in different situations, such as when you . 5. To further improve security, select Liveness check on or when it's idle for a certain period of time. Tap Lock phone after, then ... the screen is turned on the Security screen. You'll be asked to unlock the screen every time Droid DNA by HTC to unlock the screen. You'll be asked to blink to recognize your face in case the phone doesn't recognize you 're wearing glasses or sporting a beard. 76 Personalizing 4.
...lock to train Droid DNA by HTC is locked. You can also tap Improve face matching on the Security screen to use in different situations, such as when you . 5. To further improve security, select Liveness check on or when it's idle for a certain period of time. Tap Lock phone after, then ... the screen is turned on the Security screen. You'll be asked to unlock the screen every time Droid DNA by HTC to unlock the screen. You'll be asked to blink to recognize your face in case the phone doesn't recognize you 're wearing glasses or sporting a beard. 76 Personalizing 4.