Most guides online are incorrect because they assume you need a code from Black Shark. In reality, the method evolved. Here is the confirmed working method for Global and Chinese variants (SKW-H0 / SKW-A0).

Unlocking the bootloader on a Black Shark 2 Go to product viewer dialog for this item.

, navigate to > About Phone and tap on Build Number (or MIUI version) seven times until you see the "You are now a developer!" notification. Go to Settings > Additional Settings > Developer Options . Toggle on OEM Unlocking and USB Debugging . 2. Bind Your Mi Account In the Developer Options menu, tap on Mi Unlock Status .

Your phone screen will show a warning about the bootloader being unlocked. Use the volume keys to select "Unlock" and press power. The phone will factory reset and reboot.