https://arstechnica.com/gadgets/2019/03/the-galaxy-s10s-face-unlock-fooled-by-pictures-siblings/

Here's another friendly reminder that, if your Android phone doesn't have some kind of special hardware for face unlock, the feature probably isn't very secure. The latest phone to implement face unlock with nothing but the normal front camera is the Galaxy S10, and users across the web are reporting that the feature is easily confused or defeated.