DC-Unlocker still works. PotatoNV also works because the vulnerability is in the bootROM, not the OS version. Do not update to EMUI 9.1 expecting an unlock "fix" – there is no change.
Unlocking the bootloader will:
Websites like Ministry of Solutions or Global Unlocking Solutions can provide codes for a fee. You will need to provide your IMEI and Serial Number. How to Unlock Bootloader in HONOR 9 phone
adb devices
