Unlock with trusted devices
You can keep your phone unlocked when it is connected to a trusted device, like your Bluetooth watch or car.
After you set up a trusted device, every time you turn on or wake the locked phone, it searches for the device and, when it finds it, the phone unlocks.
Set up trusted devices
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.
- All options or references were filtered out.
Touch a device to select it from the list of connected devices.
TipIf your device isn't in the list, make sure you are paired with it.
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.