Buried in a post about the recent MIUI 7 China Developer ROM 5.12.4 release, Xiaomi also dropped a bomb.
An Android Marshmallow version of MIUI 7 would be rolling out soon in beta form to Mi 3 (World and China), Mi 4, and Mi Note.
MIUI 7 Kitkat support for these devices will end as early as next week, with updating stopping for the current Android 4.4 versions.
Here is what Xiaomi said in the post:
It’s been almost four months since the launching of MIUI 7.
During this time, MIUI devs have been working to bring the new
Android versions to our devices.
Here’re some good news: Mi 3 W/C, Mi 4 and Mi Note will be the
first ones to get Android M (6.0)! The beta updates will roll
out for them soon. From next week, these three devices will no
longer get updates based on Android Kitkat (4.4).