Huawei Bootloader unlock official way
 

How To Unlock Bootloader On Huawei Devices

• First Open the page
  
• Huawei Bootloader Unlock request page
• on your Computer then login to your account.(register if you don’t have an account)
• Agree to the terms and condition and click Next button. (read carefully)
• On the next page, provide the required information about your device(all from label under battery or from phone box) and hit Submit button
  (phone model select always: G520-0000, product id always: 82020577).
• If everything is correct, you’ll get a unique 16-digit bootloader unlock password for your device(3-7days).
• Now connect your Huawei device to the PC with a USB cable.(Give it required permission)
• Boot your Huawei device into bootloader/Fastboot mode using the following command:

adb reboot bootloader
or
turn off phone, wait 5sec, hold vol- button and connect to turned off phone usb cable and wait untile you not see bootloader screen.

when phone will be in bootloader/fastboot write this command:

fastboot oem unlock your-unlock-password

Replace the unlock Code with the Red text

Bootloader unlock process started, when end phone will be wiped and bootloader unlocked.

Same manual with picture here:
http://www.hardreset.info/devices/hu...huawei-unlock/