This is not the first time Android has had face recognition to unlock phones. I remember the first time they tried, it was trivially easy to snap a picture of your colleague and open his phone.
That's a beta version and I can't guarantee it was true of the release version, but since all they were working with was the normal front facing camera I doubt they were able to make this secure.
https://techcrunch.com/2011/11/11/android-facial-unlock-phot...
That's a beta version and I can't guarantee it was true of the release version, but since all they were working with was the normal front facing camera I doubt they were able to make this secure.