In this article, you will be able to unlock the bootloader on Mi 9 SE using an official method by Xiaomi. The process is simple, and the steps are quite easy if you follow them carefully. There are some specific tools to unlock the bootloader on Xiaomi devices, which is provided in the tutorial below. Read ahead and unlock the bootloader on Xiaomi Mi 9 SE quickly!

Like most of the Android phones, the Xiaomi Mi 9 SE also comes with a locked bootloader, which restricts you in many ways. A factory locked phone doesn’t allow you to gain root access or install an aftermarket firmware which is available on the various developer forum. If you are an Android enthusiast and want to modify your phone by rooting or installing custom ROM, you can not do that until and unless you unlocked the bootloader.

So, this post will guide you to unlocking the bootloader using the Mi Unlock tool, which is an official software by Xiaomi. Keep reading; do not skip a single step.
Like all other Xiaomi phones, the Mi 9 SE also got several developments on custom ROM and mods. If you check the official XDA thread on Mi 9 SE , you will find tons of stuff. But most of the builds are root based, which need a factory unlocked phone. Therefore, your first step for modification is the unlocking bootloader part. Moreover, if you want to use some fantastic root based app from the Play Store, like Greenify, Titanium Backup, Substratum, or Amplifier, you have to unlock and root your phone first. Hence, to gain the full potential of your Mi 9SE, unlock it using our tutorial below!

About Xiaomi Mi 9 SE

Xiaomi Mi 9 SE Specification
Network	GSM / CDMA / HSPA / LTE (Global)
OS And Hardware
OS	Android 9.0 (Pie); MIUI 10.3.3
Processor	Quad-core 1.5 GHz Cortex-A53
Chipset	Qualcomm SDM712 Snapdragon 712 (10 nm)
GPU	Adreno 616
Display
Type	Super AMOLED capacitive touchscreen, 16M colors
Screen Size	5.97 inches, 87.5 cm2 (~84.1% screen-to-body ratio)
Resolution	1080 x 2340 pixels, 19.5:9 ratio (~432 ppi density)
Multitouch	Yes
Protection	Corning Gorilla Glass 4
Sensors	Accelerometer, Proximity, Compass
Memory
Internal	64/128 GB
RAM	6 GB
Camera
Main	48 MP, f/1.8, (wide), 1/2.0″, 0.8µm, PDAF, 8 MP, f/2.4, (telephoto), 1/4.0″, 1.12µm, PDAF, 13 MP, f/2.4, (ultrawide), 1/3.1″, 1.12µm
Battery and Power
Type	Non-Removable Li-Po 3070 mAh battery

The phone comes with MiUI 10 based on Android 9 Pie operating system out of the box. But recently, it got updated to Android 10 based MiUI 11, thanks to the OEM. So, now, it is certain, you will be able to see LineageOS or other custom ROM based on the latest Android 10 for the Mi 9 SE in the Android community. Moreover, you will be able to use Android 10 specific modules from the Xposed framework on your device.

Once you unlock your phone, you can install a custom recovery like TWRP and flash Magisk ZIP to root your device. We also have a tutorial on how to root Mi 9 SE using Magisk or SuperSU utility. So proceed to the guide below, but before starting the tutorial, check out some vital information and prerequisites which would be required while unlocking.

Benefits of Unlocking Bootloader on Mi 9 SE
There are many benefits of Unlocking Bootloader on an Android device. Android Enthusiast or super users love to use root App from Play Store and XDA forum. So, for them, Unlocking Bootloader is the first step to experiment. Some of the main benefits of Unlocking Bootloader are:

1. Rooting: You can root your device using Magisk or SuperSU once you have a unlocked phone.
2. Custom ROM: You can try out some of the cool Custom ROM out there in the community forum for your device.
3. Custom Recovery: You can replace your current stock recovery with
4. Custom Recovery like TWRP . Recovery helps on flashing any kind of supported ZIP files on your device.
5. System modification: You can modify your Android OS in the way you want using some Xposed Modules or Magisk Modules.

Thanks to Xiaomi for providing a simple mechanism to unlock the bootloader with the Mi Unlock tool. But before heading to the tutorial, please check out the pre-requisites below. Make sure to fulfill all before proceeding to the tutorial.

WARNING: All the custom ROMs, Official Firmware, How-to guides, tutorials, roots, hacks, and tricks mentioned on our site belong to the respective developers. We are not responsible if anything goes wrong with your device. Perform it at your own risk.

Backup Mi 9 SE (Warning)
Unlocking the bootloader on Mi 9 SE will erase everything from your phone. This includes SMS, photos, apps, videos, games, contacts, or anything on your internal storage. So, before proceeding to the tutorial, make sure to back up everything from your device.

Once you are sure that you have completely backed up your data, proceed to the tutorial below to unlock bootloader on Mi 9 SE using Mi Unlock tool.
Pre-requisites

1. Make sure your phone has at least 80 – 85% charge. If not, please do charge it before starting the experiment.
2. You need to enable USB Debugging mode to connect your Android phone to computer. (Settings > About Phone > Build number > Tap it 7 times to become developer; Settings > Developer Options > USB Debugging) .
3. Enable OEM Unlock: Settings > Developer options > Enable OEM unlock.
4. You must install Android SDK tool on your computer.
5. Download Xiaomi Mi 9 SE USB Driver
6. Make sure you have correctly installed Xiaomi Mi 9 SE USB Driver on your computer. If not, please download from any official source and install it correctly. Otherwise, your computer will not detect your device.
7. → Download the latest Xiaomi Mi 9 SE USB Driver

Now, let’s proceed with the tutorial below to unlock Xiaomi Mi 9 SE bootloader.
How to Unlock Bootloader on Xiaomi Mi 9 SE
We have mentioned the full step-by-step instructions on how to unlock bootloader on Mi 9 SE Pro using Mi Unlock tool. If you are entirely new to rooting, flashing a Custom ROM or an Official Firmware, please read the entire tutorial once before actually performing it on your device .

1. The first step is to get the unlock permission on your Mi account. So, in order to get that access, you need to have a Mi account first. Also, make sure your account has a mobile number verification as well.
2. Go to Settings > Additional settings > Developer option and bind your approved Mi account under Mi Unlock Status.
   
3. Now, login into the following page:→ https://en.miui.com/unlock/
   
4. You might get some Chinese pages in the login window. You can use Google Translate to know the messages shown there.it
5. Now, once you are logged in, you will be able to see the “Apply for permission to unlock Mi devices” page. From there, you can download the “ Mi Unlock tool ” on your PC.
6. Next, boot your Mi 9 SE into Fastboot Mode. How? First, powering it off and then turn it on while pressing and holding Power + Volume Down buttons simultaneously. Hold until you see your phone is booted into Fastboot mode.
7. Connect your Mi 9 SE to the computer using compatible USB cable (preferably, the official one, provided by Xiaomi with the phone box).
8. UnZIP the Mi Unlock tool on your PC that you had downloaded in Step #3 open up miflash_unlock.exe (file name might differ due to upgrade version).
9. Now, Sign-in with your Mi account, which should be configured on your phone, and wait for the verification process. 
10. While you logged into the Mi Unlock Tool, click on the top-right gear icon to monitor the update for both USB driver and Mi Unlock Tool. Make assured you’re running the newest version.
11. Finally, press ‘Unlock ‘ and follow the timer/ waiting period shown in Mi Unlock Tool to unlock the Xiaomi Mi 9 SE successfully.
    
12. The program should now start unlocking and should also show the live status of progress percentage.
    
13. Once done, it will display “Unlocked Successfully.”
    
14. That’s it! Your Xiaomi Mi 9 SE bootloader is now unlocked!