Smart Lock allows you to keep your device unlocked when it's safe with you. To use the Smart Lock, first you need to set a Screen Lock.
To set a Screen lock
1. Go to Settings > Security.
2. Tap Screen Lock > You will now have 4 different ways to set this up; Swipe, Pattern, PIN, Password.
3. Select your preferred screen locking method.
Now this has been set up you can access Smart Lock.
To enable Smart Lock
1. Go to Settings > Security.
2. Tap Smart lock > Enter your PIN / password / pattern.
3. Enable Smart Lock.
Smart Lock options:
On-body detection: The phone will stay unlocked while it is in motion, like when walking with it. Phone will remain unlocked for up to 4 hours or until you put it down.
Trusted places: After you unlock your phone, it stays unlocked for up to 4 hours or until you leave one of your trusted places.
Trusted devices: After you unlock your phone, it stays unlocked when it's connected to a trusted device, like a Bluetooth watch or car audio system.
To disable Smart Lock
1. Go to Settings > Security.
2. Select Smart Lock > Enter your PIN / password / pattern.
3. Disable the desired Smart Lock option.
Tip: Keep in mind that Smart Lock uses on body detection that can't distinguish between you and someone else. If someone takes your device while it's unlocked, they might be able to access it.