Much has been said about using ones face to unlock Jelly bean Android but I don’t know how to switch this on on my Nexus 7.
Does it even work? Surely it can’t work in the dark??
You can set up biometric face unlock in Settings -> Security -> Screen lock. I’ve heard that it needs “good light” for it to work, but not tried it myself (my Jelly Bean not turned up yet!)
I’d be interested to know if it can register multiple faces?