Install Android 10 on Huawei Mate 9 (AOSP GSI Treble ROM) - How to Guide! - YouTube
Huawei Android 9 Pie update: EMUI 9 stable now available for P20, P10, Mate 10, Honor 10, View 10, Honor Play, Honor 8X, and Honor 8 Pro across the globe
Update OmniROM on Huawei Mate 8 based on Android 9.0 Pie