It appears that someone put out a Mi Mix 3 poster a bit too early. The poster doesn’t show a lot that we didn’t already know but it still confirms cool looking green and blue variants. And we get to see the rear-mounted fingerprint reader.
The theory of in-display fingerprint was initially thrown around and since the Xiaomi Mi 8 Pro and Explorer Edition were both equipped with the tech, it sounded legit. But then the first photo of the back panel leaked the other day made us think twice.
At least the Mi Mix 3 offers advanced 3D face unlocking tech on the slider so if you are not a fan of the fingerprint placement, there’s always an alternative.
Source (in Chinese)