The Mi 9 SE (codenamed grus) was Xiaomi’s compact flagship featuring a 5.97-inch AMOLED display, Snapdragon 712 processor, and triple 48MP camera system in a small form factor. If your device is experiencing performance issues, camera malfunctions, battery drain, or software instability, this guide provides the official MIUI fastboot ROMs needed for complete system restoration.

Important Notice: Verify your device codename is grus before flashing. The Mi 9 SE has a unique compact design with flagship-level cameras. Flashing incorrect firmware will result in a non-functional device.

Quick Device Specifications

Device: Mi 9 SE (grus)
Release Year: 2019
Chipset: Qualcomm Snapdragon 712 (10nm)
Display: 5.97″ AMOLED, 1080 × 2340 pixels (19.5:9)
Camera: 48MP + 8MP + 13MP triple rear, 20MP front camera
Battery: 3070 mAh with 18W fast charging
Security: In-display fingerprint scanner
Special Feature: Compact flagship with premium cameras
Original OS: Android 9.0 Pie, MIUI 10

Essential Downloads & Tools

File / Tool	Download Link
Xiaomi Mi Flash Tool	Download Latest Version
Qualcomm USB Drivers	Download Latest Drivers
ADB and Fastboot Tools	Official from Google
Mi Unlock Tool	Bootloader Unlock

Official Fastboot ROM Collection

Region / Variant	Build Version	Android	Release Date	Download Link
China Stable	V12.5.4.0.RFBCNXM	11.0	2021-11-17	Download
Global Stable	V12.5.1.0.RFBMIXM	11.0	2021-05-16	Download
Xiaomi.eu (Custom)	V12.5.4.0.RFBCNXM (Based)	11.0	—	Download

Flashing Guide for Mi 9 SE (grus)

Driver Installation: Install Qualcomm USB drivers on your computer before connecting the device.
Bootloader Unlock: If flashing different region ROM, unlock bootloader first using Mi Unlock Tool (requires Mi account authorization and waiting period).
Enter Fastboot Mode: Power off device, then hold Volume Down + Power buttons until Fastboot logo appears.
Flash Process:
- Extract the downloaded .tgz file to access the firmware folder
- Open Mi Flash Tool and browse to the extracted folder
- Select “Clean All” option for a fresh installation (recommended for troubleshooting)
- Click “Flash” and wait for the process to complete (typically 4-6 minutes)
First Boot: Initial boot may take 5-10 minutes as the system optimizes applications.
Sensor Calibration: After setup, calibrate the in-display fingerprint sensor through settings.

Frequently Asked Questions (FAQs)

Q1. Why is my in-display fingerprint scanner not working properly after update?
The optical fingerprint sensor requires specific calibration. Flash the complete stock ROM and recalibrate the fingerprint through the hardware test menu (##6484## → Fingerprint Test). Ensure screen protector is compatible with optical sensors.

Q2. Can I upgrade to Android 12 on Mi 9 SE?
No, Android 11 was the final official Android version for Mi 9 SE. However, there are custom ROMs like Pixel Experience and LineageOS 19 (Android 12) available if you unlock the bootloader and install custom recovery.

Q3. Why is the China ROM version newer than the Global ROM?
Xiaomi typically provides longer update support for the Chinese market. The China variant received MIUI 12.5 based on Android 11 with more recent security patches.

Q4. My 48MP camera is producing blurry photos. Can flashing help?
Yes, camera issues are often software-related. Flashing the stock ROM recalibrates the camera sensors and can resolve focus and image processing problems with the Sony IMX586 main sensor.

Device-Specific Troubleshooting

Camera Performance: The triple camera system requires specific calibration. After flashing, test all cameras and use hardware test menu for calibration if needed.
Battery Optimization: The 3070mAh battery is relatively small for flagship features. Use battery optimization features and calibrate after flashing.
Display Issues: The AMOLED display may require color recalibration after flashing. Adjust display settings in MIUI.
Performance Management: The Snapdragon 712 performs well but may throttle under load. Use Game Turbo for better gaming performance.

Version Comparison Advice

China ROM (V12.5.4.0): Newest features, latest security patches (November 2021), but may contain Chinese apps and lack some Google services optimization.

Global ROM (V12.5.1.0): Better Google services integration, more stable for international users, but older security patches (May 2021).

Xiaomi.eu ROM: Best compromise – based on China ROM but debloated, with Google services added, and optimized for global use with latest security patches.