Xiaomi unrolled the long-overdue Android 9 Pie beta update for the Mi Box 3 earlier this year in August. The update, which measured in at just 620MB, brought Android Pie to the Android TV box and introduced support for the Mi Remote app.
Xiaomi is finally releasing a stable version of the update to the Mi Box 3, which brings Android TV 9.0 and support for the Mi Remote app to the stable channel.The Mi Box 3 stable Android Pie update measures in at 650MB and it includes the Android security patches for July 2020.
With the update, Xiaomi has added a few of latest features to the Android TV box, including a replacement settings layout, a replacement power menu which will be accessed by pressing and holding the facility button, a less intrusive volume interface, preinstalled Amazon Prime Video app, a Mi Box recommends section within the app drawer, a shortcut for the Google Play Store, and more.
A Reddit thread on the matter, the update has started rolling bent Mi Box 3 users worldwide and it should be available on your device.