Vivo has some crazy ideas and it’s not afraid to use them. It wasn’t content to put an in-display fingerprint scanner on the Vivo X20 UD, it had to turn half the screen into one as well. Plus, it moved the front camera out of the bezel and into a motorized sliding popup. It might bring it back to the front, though, at least to make its latest innovation possible. It’s simply calling it the Vivo TOF (time of flight) 3D Sensing Technology and it’s issuing a challenge to Apple’s own tech.