MIUI 10 Global. Schedule of updates.

Mid September
Redmi Note 5 / Pro
Redmi S2
Mi 6
Mi 8
Mi Mix
Mi Mix 2
Mi Mix 2s
Mi 5
Mi Note 2

End of September
Redmi 5 Plus

Mid October
Mi Note 3
Redmi 6
Redmi 6A
Mi 5s
Mi 5s Plus
Mi Max
Mi Max Prime
Mi Max 2
Redmi Note 4 / 4X (Qualcomm)
Redmi 4X
Redmi 4A
Redmi 5A
Redmi 5
Redmi Note 5A
Redmi Note 5A Prime.

The beginning of November
Mi 3 / Mi 4,
Redmi Note 3 Qualcomm
Redmi Note 3 Special Edition
Redmi 3S / 3X.
Redmi Note 4 MTK
Redmi 4 Prime