MIUI 9 Dark Display Bug After Updating Mobile Handset.....

Xiaomi has started a roll-out of the MIUI 9 Global Stable update for the devices. MIUI 9 Global was announced on November 2, and started rolling-out to multiple devices in the same month. The Redmi Note 4, Mi Max 2, Mi Mix 2, Mi Mix, Mi 6, Redmi 4 and the Redmi Y1 are some of the Xiaomi devices which have already received the MIUI 9 Global Stable update.

But, some users in india facing Black Screen issue in Redmi Note 4, Redmi 4, Redmi Y1 devices. 

all functions and calling work but totally screens get black, only after rebooting device it works fine 

service center's telling people to dont update MIUI 9 for now.

MIUI 9 Global brings improved performance, updated animations, split screen, App Vault, and localisation features for India