There are three ways Xiaomi Redmi update:
With system update tool you can flash full Xiaomi Redmi firmware, download firmware here and save it into internal storage, go to the settings – about phone – system update – choose update package – select downloaded rom, press “OK” and wait for the end of updating.
If you want to flash stock firmware for Xiaomi Redmi using Fastboot – download and unpack ADB&Fastboot, install Drivers. How to flash stock firmware Xiaomi Redmi using Fastboot instruction is here (you need to unlock the Xiaomi bootloader).
This method works on all Xiaomi smartphones. The only exception of unlock Xiaomi bootloader usage – on some phones you will first need to install the weekly firmware assembly. Here you can find firmware version that fit your smartphone model.
The process of unlock bootloader Xiaomi Redmi 4 and other bootloaders is divided into several stages, among which:
It is important – in order to successfully unlock the bootloader Xiaomi, your smartphone must be tied to Mi account for at least 3 days.
A preparation for unlock Xiaomi bootloader:
Done! Once your application is approved by Xiaomi, you will receive SMS message with the following content. You have almost reached your goal, you just need to unlock Xiaomi bootloader.
To unlock Xiaomi bootloader tool:
Done! Now you know how to unlock Xiaomi bootloader!
Have you managed to unlock Xiaomi bootloader tool? Share your impressions in the comments below!