We turn our attention to the top of the phone to find the much anticipated mini Kinect TrueDepth camera system! This system rallies a team of sensors to bring facial recognition to the X.

Step one in this system: the flood illuminator embedded in the display blasts your face with infrared (IR) light.

Next, the front-facing camera, marked in red, confirms the presence of a face.

Then the IR dot projector, far right, projects a grid of dots over your face to create a three-dimensional map.

Finally, the IR camera on the left reads this map, and sends the data to the phone.

Under the hood, the X works some seriously fast software magic to bring all these pieces together and figure out if you're you, or your evil twin.