Xiaomi started to Rollout MIUI 9 to multiple devices a month ago. Now Mi Max and and its India-exclusive variant the Xiaomi Mi Max Prime are receiving the update.
The upgrade weighs around 1.5GB and bumps the version to V126.96.36.199.NBCMIEI for Mi Max. The upgrade for Prime version also weighs same and bumps the version as V188.8.131.52.NBDMIEI.
MIUI 9 brings number of features for Xiaomi users like Split Screen, Search for Apps, Dual Apps and a new assistant, accessible with a left swipe from the home screen.