How to Unlock Bootloader of any Xiaomi / Redmi phone 2019?

STEPS..

First thing to know that you cannot unlock a bootloader without a laptop/computer so you will need one..

So let's just go ahead and look for steps..

1.) First go to this link : LINK and Click unlock Now.

2.) Then Log In with your MI ID...

3.) Generally it takes 7 to 8 days to gain permission for unlocking your phone but I have   

     already received permission to unlock my boot-loader and so it is showing me to  

     download the mi unlock tool..

4.) After downloading the tool and extracting the .rar file

     Then open MiUsbDriver to install drivers and then..

     Open this software installer.. miflash_unlock

5.) Click Agree...

5.) Then it will check whether your MI Account has permission to unlock your phone or not..

6.) Then if your phone has permission this screen will appear.

7.) Then enter your phone's fastboot by pressing volume down+power button.

      and connect it to your laptop.

   

8.) Now your phone will be unlocked and if some error occurs just retry.. and it will be successful.