Android 8.1 Oreo Custom ROM Xiaomi Update Xiaomi Redmi Note 4 to Android 8.1 Oreo using custom ROMS [Pixel 2 AOSP ROM]
Android 7.0 Nougat How To MIUI Xiaomi Update Redmi Note 4/4X to official Android 7.0 Nougat based on MIUI 8.5.4 [Download stock firmware]
Xiaomi Android 7.0 Nougat MIUI 8 based on Android 7.0 Nougat roll out in May – How to download and install right now