This Pixel 4 XL teardown shows just how small the Soli system is
Google made the unconventional (by 2019 standards) decision to skip the notch on the Pixel 4 in favor of an old-fashioned top bezel in order to fit in all of the advanced face unlock and Soli radar tech. But thanks to iFixit’s traditional teardown, we finally got a better idea of just how small those systems are. There may not be a notch, but the fact that Google managed to fit all of this stuff into the bezel in the first place is impressive.
The image below shows the whole chunk of the bezel: the left is an ambient light sensor, the middle is the top earpiece, and that small green / gray rectangle is the entire Soli radar assembly. There’s plenty of other hardware in the bezel, too, including the camera and IR face unlock system, but…