Can I unlock bootloader for Mi phone? I've been told that I need to ask permission from Xiaomi to unlock bootloader. Why and is there any other way?
Btw, I'm currently using Redmi 5A.
Here is the all information to unlock bootloader of redmi 5a without asking redmi with unofficial way
Pre required-


Pc running on Windows.
Download Mi flash and Mi drivers from here.
Download official twrp recovery for redmi 5a here.
Follow the guidelines given in above XDA thread link.


Good Luck