To keep your phone secure, use a screen lock when it goes to sleep:

• Choose a pattern, PIN, or password to unlock. Add a Smart Lock to unlock automatically when connected to a trusted device, when you're at a trusted place (like home or work), using facial recognition, using voice recognition, or until you set your phone down.
• You can access notifications and quick settings, start a call, and launch the camera from the lock screen.
• You can make emergency calls on a locked phone. A locked phone still rings; you don't need to unlock it to answer.
• If you forgot your pattern, PIN, or password, follow these steps.

You can customize the lock screen by adding your contact info. You can also control which notifications appear on your lock screen.

For additional security, you can also:

• Protect your phone in case it’s lost or stolen. Use Find My Device.
• Block all calls and text messages from a number by requesting a block from your carrier or by downloading a number blocking app from Play Store.
• Connect to a virtual private network if you need to access files on a secure network.
• Add a SIM lock to prevent others from using your cellular plan and accessing account information if your phone is stolen.
• Encrypt your phone. Encryption protects the accounts, apps, and files so that people cannot access them if your phone is stolen.
• Prevent viruses and other attacks on your data and privacy with Google Play Protect.