Spudger ready, we turn our attention to the square Nexus Imprint sensor.

Wait. Square? Wasn't this thing round when we first saw it?

It turns out this version of the Imprint sensor is quite different from the one we found in the 5X. The circular profile of this fingerprint reader is solely due to the round hole in the 6P's rear case.

Perhaps Huawei is planning to use this very fingerprint reader in one of their other phones. Handy.

Fingerprints FPC1020 fingerprint sensor

Fingerprints FPC2050 fingerprint controller (likely)