Smart Lock allows you to unlock your phone without using a screen lock type when trusted locations (work, home) or other devices (Bluetooth headset, NFC tag) have been detected.
A secure lock type (PIN, pattern, fingerprint, etc.) must be turned on for Secure lock settings to be available.
From a Home screen, swipe up or down from the center of the display to access the apps screen.
These instructions only apply to Standard mode and the default Home screen layout.
Navigate: Settings > Lock screen and security.
Tap Smart Lock.
If presented, enter the current PIN, password, or pattern.
Select any of the following options then follow the on-screen instructions to set up a trusted unlock:
For more info on Smart Lock (editing, removing settings, etc.), refer to the Google support page.
Available options vary by device.
Keeps your phone unlocked while it's on you
Set locations (home, work, etc.) to keep your phone unlocked whenever you're there
Set Bluetooth or NFC devices to keep your phone unlocked when that device is connected