That was quick.
The latest software update will be available on almost all the recent Xiaomi handsets. In case you cannot wait for the update to arrive, you can go to this link and find an update link for your Xiaomi device.
MIUI 8.2 is currently supported by Mi Max, Mi Max Prime, Mi 4i, Mi 3, Mi 4, Mi Note,
Other than the above mentioned smartphones, Xiaomi has also slated the MIUI 8.2 ROM for more models starting February 20. The second badge of smartphones include Redmi 2, Redmi 2 Prime,
Xiaomi has also listed the full Changelog on the source . The major highlights include improved layout for toggles in the Notification shade, full control over automated tasks and brand new system sounds and ringtones. Other than these, there are some additional features included in the lock screen, status bar, Homescreen and notification bar. The company has also included the necessary optimisations and fixes.