 If you have Face ID on your phone, you might wonder if someone could unlock it while you're sleeping. I'm Kim Commando for Hear.com slash Kim. Have hearing problems? Get a free hearing evaluation now at Hear.com slash Kim. Facial recognition systems like Face ID on iPhones are generally designed not to work if your eyes are closed. This means that someone can't unlock your phone by holding it right in front of your sleeping face. But there is a catch.