Download Install LineageOS 16 on Huawei Mate 9 custom ROM
Now you can run stock Android on your Huawei & honor devices - SoyaCincau
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
Download Huawei Mate 9 B170 Nougat Update - Android - Learn in 30 Sec from Microsoft Awarded MVP
Download/Install Havoc OS Pie ROM On Huawei Mate 9 | Android 9.0
Custom Rom + Root - Ccsolution
Install Android 10 on Huawei Mate 9 (AOSP GSI Treble ROM) - How to Guide! - YouTube
Full Huawei Mate 30 Pro Downgrade Firmware Install Google Play Store With USB - ICTfix