Users in India are reporting that the Redmi Note 5 Pro and Redmi 6 Pro, which were launched last year, have started getting the MIUI 10.3.1 update based on Android Pie. Xiaomi is yet to confirm whether this update is rolling out to all, but based on the MIUI forum reports and user screenshots, this is likely a phased roll out for the MIUI 10.3.1 update .
According to screenshots posted by users, the MIUI 10.3 global stable update includes a system-wide Dark Mode for both phones. The update is around 1.6GB in size for the Redmi Note 5 Pro and Redmi 6 Pro, according to the screenshots that some users have shared. It also brings the May 2019 Android security patch.
The major feature that is highlighted is the Dark mode, along with the Android Pie addition. In Dark mode, the entire system background turns to black from white, which is supposed to be better for battery consumption and also reduces strain on the eyes.