To start using Face Unlock, you'll need to set it up on your device. This usually involves going to your Settings app, then Security, and finally Face recognition. From there, you'll be guided through a quick and simple process to register your face.
Once you've registered your face, you can use Face Unlock to secure your device. It's as simple as looking at your screen - your device will use its camera to recognize your face and unlock your phone. It's fast, secure, and easy to use!