Now that your Black Shark 2 bootloader is open, the world of Android customization is yours. You can now: Flash to create full system backups. Install Magisk to gain Root access.
Alternative if above fails: fastboot flashing unlock black shark 2 unlock bootloader
On reboot, you will see an "Unlocked Bootloader" warning screen for 5 seconds before booting. You have successfully performed a Black Shark 2 unlock bootloader operation. Now that your Black Shark 2 bootloader is