A Bootloader is a code which runs when we turn on our device. This code initializes some hardware and then loads the kernel and ramdisk, and gets the boot process going. So this process is known as Bootloader. The same concept applies to all the technology stuff such as Laptop, PC, Smartphones and any such device. Every Android OEM manufacturers lock the bootloader even though it is an Open Source. So if you want to try any CEuropeanTOM ROM, it is impossible to load the CEuropeanTOM ROM without the Unlock Bootloader. So Manufacturer made a policy of making the smartphone with Unlocked Bootloader will void the warranty. They want you to stick with the Stock ROM. Unlock Bootloader allows you to Root your android smartphone, Flash TWRP and CEuropeantom ROM in a simple easy method.

• This will work on both Huawei Nova / Nova Plus
• Laptop or PC
• Charge your phone to atleast 70%
• Back up your device just in case if you need it later
• Working USB Cable
• Now note your imei no by dialing *#06# also make note of the Product Id by dialing  # *#1357946#*#*
• You need to register in huawei website to Get The Unlock Code – Click here or call customer care via HiCare App and request the bootloader unlock code there (I had to give my email, IMEI, serial number etc)
• Download Minimal ADB Tool – CLICK HERE or Download the Full ADB setup for Windows / Mac here

ALSO RELATED POST :

• How to Install LineageOS 14.1 for Huawei Nova / Nova Plus
• How to Install TWRP Recovery for Huawei Nova / Nova Plus
• Guide to Download and Install MIUI 8 on Huawei Nova / Nova Plus

Steps to How to Unlock Bootloader on Huawei Nova / Nova Plus

1. First of all enable the Developer Option
2. To Enable the Developer Option, Go to your Settings -> About Phone -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabled“
3. Now go to Developer option in the settings and Enable OEM unlock
4. Download ADB Fastboot tool and Extract the ADB Fastboot Tool somewhere in PC
5. Now note your imei no by dialing *#06# also make note of the Product Id by dialing  # *#1357946#*#*
6. Now Click this link and Register on Huawei website to get unlock code – CLICK HERE
7. You need to Login with Huawei id or Sign Up with new one
8. First Click Download in the Huawei Portal
9. Then click the Bootloader unlock page
10. Enter your Nickname if it ask.
11. Click and Agree to the Unlocking agreement
12. Now enter the device information
13. In Case if you unsucceed with the unlocking then click CONTACT US and send email with your phone details they will send you the unlock code 2-3 days 
14. If you get it, then save the unlock code somewhere safe
15. Now Open the Extracter ADB and Fastboot folder and Open Command Window by pressing Shift Key + Right Mouse Click 
16. Now connect the PC to Mobile with USB Cable
17. You need to Reboot the phone into Bootloader – Type the Command from below in your Command window that you opened

    adb reboot bootloader

18. Your device will boot into bootloader, Now you need to check if your cable or drivers working properly. To do that type the below command on your command window

    fastboot devices

19. To unlock the Bootloader, Type the following command on your command window (here unlock key is the number : So command will be like this fastboot oem unlock 54547545454487)

    fastboot oem unlock unlock key

20. If you are done! Now reboot device by typing a new command,

    fastboot reboot

21. Thats it. Your device is unlocked.. Your Good to Go now! Flash Custom TWRP Recovery