How to Unlock Bootloader of Xiaomi Phones

Xiaomi Inc. is a privately owned Chinese electronics and software company headquartered in Beijing. It is the world's 5th largest smartphone maker in 2017. Xiaomi managed to take the electronics and mobile world by storm in 2014. Their flagship device, Mi4 was one of the best-selling phones in history and paved the path for mid-level mobile phones and their market base.

The latest Xiaomi phones come with locked bootloader. If you want root, you’d be wanting to flash Custom ROM post-root, and if you want to install a Custom ROM, you’d need to have your stock bootloader unlocked. In simple terms Unlocking the bootloader allows you to install custom Firmware on your Android device in this case a Xiaomi phone.

"Warning: Unlocking your phone’s bootloader voids its warranty. However, we strongly recommend you to unlock the bootloader or root the device if you are confident in your understanding of the risks involved."

The below laid down procedure is the same for:

• Redmi Note 4 
• Redmi Note 3 
• Redmi 3s Prime 
• Redmi 3s 
• Mi 5 
• Redmi 4 
• Mi Mix 
• Mi Max 
• etc 

Let's get started with the this:

Prerequisites:
1. You would need bootloader unlocking permission from MI. Get the permission from http://en.miui.com/unlock/‌
2. Wait for permission message. It would take anywhere between 7-14 days to get the permission.
3. Latest China or Global Stable and Developer ROM installed on the phone.
4. Download Mi Unlock tool from http://en.miui.com/unlock/download_en.html

Follow the below steps once you get the permission:
1. Firstly, you need to be on the latest China & Global Stable and Developer ROM. Then goto phone Settings -> About phone -> MIUI Version (Tap multiple times to enable developer option).
2. Settings -> Additional settings -> Developer options -> Turn on OEM unlocking option.
3. Under the same Developer Options go to Mi Unlock Status -> Add account and device. This will bind your account to your device.
4. Log into the Mi account which has acquired unlocking permission on your device.
5. Turn off your device, press the “Power button” and “Volume -” button at the same time to enter bootloader mode.
6. Log into Mi unlocking tool on PC with the same Mi account. Connect the device with the PC using USB cable.
7. Press 'Unlock'. The unlocking process will complete in about 10-15 seconds.

Congratulations! You have successfully unblocked your phone.