https://www.androidsage.com/2017/02/15/miui-8-2-for-xiaomi-mi-max-prime-mi-4i-3-4-mi-note-redmi-1s-redmi-note-4g/
MIUI 8.2 for Xiaomi Mi Max (Prime) Mi 4i, 3, 4, Mi Note, Redmi 1S, Redmi Note 4G