Google Nexus 4 Manual Book page 42

when your phone's display goes to sleep or if
you press the Power button.
You can set locks of different strengths us-
ing lock settings:
1. Go to
> Screen lock.
2. Touch the type of lock you'd like to use.
Face Unlock is one of the options available.
After you've set it up, you can unlock your
phone simply by looking at it. Although Face
Unlock is not very secure, it can be conve-
nient and fun to use.
TIP: After you set up Face Unlock, look
under Settings > Personal > Security
for two additional settings: Improve
face matching and Liveness check.
Use these to make Face Unlock more
reliable and secure.
EXPLORE YOUR PHONE
Settings > Personal > Security
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