Unlock with trusted devices
Set up trusted devices
You can keep your phone unlocked when it is connected to a trusted device, like your Bluetooth watch or car.
Make sure you have:
- set a screen lock on the phone.
- turned on Bluetooth on the phone.
- Paired your phone with the device.
- Go to Settings.
Touch Security > Smart Lock.
If you don't see Smart Lock, try the following:
- Update Google Play services. In the Google Search widget on your Home screen, search for ‘Google Play services’, then touch the app to open it in Google Play.
- Go to Settings > Security > Trust agents and enable Smart Lock.
- Unlock your phone, then touch Trusted devices > ADD TRUSTED DEVICE.
- Follow the onscreen instructions.
When the phone is connected to the device, the phone automatically unlocks.
Remove trusted devices
- Go to Settings.
- Touch Security > Smart Lock.
- Unlock your phone, then touch Trusted devices.
- Touch the device name, then touch OK to confirm.
Manually lock phone
If you need to make sure the phone stays locked even when you’re connected to a trusted device, you can manually lock the phone.
On the lock screen, touch 
. The phone stays locked until the next time you manually unlock it.