Huawei officially shut down bootloader unlock code services in 2018. If you are buying a used Mate 9 today, . If you are lucky to own a device unlocked from 2017, guard it with your life. For locked devices, workarounds exist (using DC-Unlocker paid software or older downgrade exploits), but they are risky and complex. No bootloader unlock = No custom ROM.
Turn off the device, then hold Volume Up + Power until the recovery screen appears.
If your Huawei Mate 9 is your primary banking and daily communication device, and you rely on Wi-Fi calling, stick to EMUI 8. The custom ROM scene for Kirin devices is a hobbyist’s paradise, not a corporate support line. huawei mate 9 custom rom
Android Authority | Reading Time: 11 Minutes
Huawei’s EMUI skin is notorious for bloatware. Custom ROMs like LineageOS or Pixel Experience are "stock Android." They strip away the unnecessary background processes. The Kirin 960 processor, when unburdened by heavy skins, can still handle modern apps surprisingly well. Huawei officially shut down bootloader unlock code services
Download your chosen ROM (ZIP format) and the appropriate GApps (Google Apps) package if the ROM doesn't include it.
: A PC with Platform Tools is required to send commands to the device in bootloader mode. General Installation Steps If your Huawei Mate 9 is your primary
Demonstrates improved speed and smoothness compared to official EMUI, with working Bluetooth, Wi-Fi, and file transfer. Android 10 (AOSP GSI):
Go to Wipe > Format Data (Type "yes"). This removes Huawei’s encryption.