https://www.cnet.com/news/phones-with-facial-recognition-iphone-x-galaxy-s9-lg-g7/

Apple, however, uses another method that, while not perfect, works better than its competitors. Branded as FaceID and implemented on the iPhone X, it uses an infrared camera, a depth sensor and a dot projector to map out 30,000 points on your face and create an artificial 3D scan. FaceID is secure enough, in fact, to use for digital payments through Apple Pay.

Most Android phones these days don't have this level of face unlocking, and don't integrate the feature with digital payments. But some are following in Apple's footsteps, with Xiaomi announcing a similar infrared method in their latest phones. With the launch of Qualcomm's Snapdragon 845 processor, which supports the infrared mapping technology, we can only expect more Android phones to better improve their face unlock feature.