[jeroenhd]

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.

[andai]

Thanks. What I meant was when I unlock my phone, there's a little "camera is being used" icon that pops up momentarily. After the unlock. I don't use face unlock. I thought it was an anti theft thing, but that's disabled too.

[jeroenhd]

The little indicator stays for a while after activation to prevent apps from pinging the camera for a few milliseconds without a trace. It doesn't necessarily mean that the camera is still being used, though it could be if it stays around for longer than a second or so.

[throwawayffffas]

For the extra paranoid, tape over the camera is the way to go.

[ramon156]

I would like a slider similar to my Thinkpad

[fsflover]

My phone has a hardware kill switch for that.