Together with a beta version of MIUI 10
If you happen to own a Mi MIX 2S with a China ROM, there’s a good chance that you get access to BOTH MIUI 10 and Android Pie.
While MIUI 10 is still in beta mode, those who are lucky to receive it noticed that their phone’s performance has become smoother and that issues with the camera UI have been resolved. In addition, the said build includes Android Pie features like Digital Wellbeing and Adaptive Battery.
