Having an Huawei phone with the locked bootloader means you can not root or flash custom ROM. This service allows you to unlock the bootloader on your Huawei phone by app and USB cable (this is not network unlocking).
2. Open the minimal_adb_fastboot_v1.4.1.exe
3. Connect the Huawei phone with FASTBOOT MODE.
4. Enter Huawei bootloader unlock code, use this command:
fastboot oem unlock ******
5. Output result will be Unlocked.