It didn't have face detection at all, it had an iris scanner. Where in that article does it say infra-red dot map of a face? From https://www.petri.com/windows

It didn't have face detection at all, it had an iris scanner. Where in that article does it say infra-red dot map of a face? From https://www.petri.com/windows-10-tip-using-the-lumia-950-with-windows-hello https://www.petri.com/windows-10-tip-using-the-lumia-950-wit...: >Let’s be clear about how Windows Hello works on the Lumia 950. It doesn’t use facial recognition, but instead relies on the front camera and a nearfield IR diode so that the camera can clearly see your iris. When you enable Windows Hello for the first time, your iris is scanned and a cryptographic hash is generated and stored securely on the phone. When you attempt to unlock the device using Windows Hello, a new hash is generated and compared with the original, and if the two match, access is granted. >Facial recognition on the other hand, as used in some new notebooks designed for Windows 10 and Intel’s RealSense F200 camera, uses three different methods to recognize your face: infrared, a standard camera, and a 3D camera. This technology requires more space inside the device and as such isn’t suitable for use in phones, but unlike iris scanning works at a distance. You didn't get downvoted for mentioning a feature already implemented elsewhere, you were downvoted by trying to claim a device did something it clearly didn't.