Correct. Depending on the phone, on Android the face unlock will not work with a 2D image. Perhaps only on cheaper phones. On Windows for example you can't eve

Correct. Depending on the phone, on Android the face unlock will not work with a 2D image. Perhaps only on cheaper phones. On Windows for example you can't even have face unlock without a sensor that will provide 3D details so most laptops don't support Windows Hello.