Go to security settings and disable face unlock. If you want to be extra safe against Google, go to the advanced security settings, find the "trust agents", and disable the ability for Google Play Services to unlock your phone. That'll also kill any other unlock mechanisms you may have forgotten about tied to Google's services.

If unlock features remain after that, it's a manufacturer feature that's been set up. In that case you'll have to look for a guide for your specific brand and model.

Your phone can't turn this on by itself, if it's doing face recognition that means you set it up at some point.

I mean it's nice that someone helped you but if you're incapable of turning such a setting off yourself, or doing some basic research to find out how to turn it off - surely you'd feel threatened by the numerous other features of the phone that you're likely unaware of?

It's like willingly walking through a minefield.

If you've ever actually looked into the implementation details of how face unlock works, you might feel a bit less spooked. Android and iOS go a very long way to isolate biometrics from the rest of the system. It's good to be skeptical, but it's also worthwhile to do some research.

> I don't have access to those images, but someone already has photos of my eyeballs!

Citation needed.

Not sure if it's a joke, but twins don't have the same biometrics