Xiaomi Mi MIX 2 (chiron) Firmware Flash File Download [Stock ROM]
The Mi MIX 2 (codenamed chiron) was Xiaomi’s flagship smartphone featuring a ceramic unibody design, Snapdragon 835 processor, and bezel-less display. If your device is experiencing performance issues, camera problems, software instability, or connectivity problems, this guide provides the official MIUI fastboot ROMs and TWRP recovery needed for complete system restoration.
Important Notice: Verify your device codename is chiron before flashing. The Mi MIX 2 has a unique ceramic body and premium components that require specific firmware. Flashing incorrect firmware will result in a non-functional device.
Quick Device Specifications
- Device: Mi MIX 2 (chiron)
- Release Year: 2017
- Chipset: Qualcomm Snapdragon 835 (10nm)
- Display: 5.99″ IPS LCD, 1080 × 2160 pixels (18:9)
- Camera: 12MP rear (4-axis OIS), 5MP front camera
- Battery: 3400 mAh with Quick Charge 3.0
- RAM: 6GB/8GB LPDDR4X
- Storage: 64GB/128GB/256GB UFS 2.1
- Security: Rear fingerprint scanner
- Special Feature: Ceramic unibody, bezel-less design, 4-axis OIS
- Original OS: Android 7.1 Nougat, MIUI 8
Essential Downloads & Tools
| File / Tool | Download Link |
|---|---|
| Xiaomi Mi Flash Tool | Download Stable Version |
| Qualcomm USB Drivers | Download Latest Drivers |
| TWRP Recovery (Official) | TWRP 3.3.1-1 for chiron |
| TWRP Recovery (Custom) | TWRP 3.3.2B for chiron |
| 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 | V12.0.1.0.PDECNXM | 9.0 | 2020-07-31 | Download |
| Global Stable | V12.0.1.0.PDEMIXM | 9.0 | 2020-09-25 | Download |
| Xiaomi.eu (Custom) | V12.0.1.0.PDECNXM (Based) | 9.0 | — | Download |
| TWRP Recovery (Official) | 3.3.1-1 | 9.0 | — | Download |
| TWRP Recovery (Custom) | 3.3.2B-0308 | 9.0 | — | Download |
Flashing Guide for Mi MIX 2 (chiron)
Method 1: Fastboot Flashing (Official)
- Driver Installation: Install Qualcomm USB drivers on your computer.
- Bootloader Unlock: Unlock bootloader using Mi Unlock Tool (requires waiting period).
- Enter Fastboot Mode: Power off device, then hold Volume Down + Power buttons.
- Flash Process:
- Extract the .tgz file to access firmware folder
- Open Mi Flash Tool and browse to extracted folder
- Select “Clean All” option for fresh installation
- Click “Flash” and wait for completion (5-7 minutes)
- First Boot: Initial boot may take 5-10 minutes as system optimizes.
Method 2: TWRP Recovery (Custom ROMs)
- Flash TWRP:
fastboot flash recovery twrp.img - Boot to TWRP:
fastboot boot twrp.img - Format Data: Wipe → Format Data → type “yes” (required for encryption)
- Install Custom ROM: Flash Xiaomi.eu or other custom ROMs
- Optional: Flash Magisk for root access
- Reboot: Reboot to system
Frequently Asked Questions (FAQs)
Q1. Why is my camera OIS not working properly after update?
The 4-axis optical image stabilization requires specific calibration. Flash the stock ROM and recalibrate through hardware test menu (##6484## → Sensor Test → Gyroscope Test).
Q2. Can I upgrade to Android 11 or 12 on Mi MIX 2?
Yes! While Android 9 was the final official version, chiron has good custom ROM support. You can install:
- Pixel Experience (Android 11)
- LineageOS 18.1 (Android 11)
- Some Android 12 ROMs (check XDA for compatibility)
Q3. Why is the ceramic body affecting signal reception?
The ceramic unibody can slightly affect signal strength. Ensure you’re using the correct regional firmware for optimal modem configuration and network compatibility.
Q4. How can I improve battery life on my device?
The 3400mAh battery may need calibration after years of use. After flashing, calibrate the battery by charging to 100%, draining completely, then charging to 100% again without interruption.
Device-Specific Troubleshooting
- Camera OIS Issues: The 4-axis OIS needs proper calibration. Test camera stability after flashing.
- Signal Reception: Ceramic body may affect signals. Use correct regional firmware.
- Battery Health: The battery may be degraded due to age. Consider replacement if capacity is low.
- Performance: Snapdragon 835 still offers good performance for daily tasks.
TWRP Installation Guide
- Unlock bootloader officially through Mi Unlock
- Boot to fastboot mode: Power off → Volume Down + Power
- Flash TWRP:
fastboot flash recovery twrp-3.3.1-1-chiron.img - Boot to TWRP:
fastboot boot twrp-3.3.1-1-chiron.img - Format Data: Wipe → Format Data → type “yes”
- Now you can flash custom ROMs or take backups
Note: The custom TWRP 3.3.2B may offer better compatibility with newer Android versions.
Version Comparison Advice
China ROM (V12.0.1.0): Newest official (MIUI 12), July 2020 security patches
Global ROM (V12.0.1.0): Better for international users, September 2020 security
Xiaomi.eu ROM: Best MIUI experience – debloated with Google services
Custom ROMs: Recommended for newer Android versions (up to Android 12)
Custom ROM Recommendations
For Stability: Pixel Experience (Android 11)
For Performance: LineageOS 18.1
For Features: crDroid (Android 11)
For Battery Life: ArrowOS (Android 11)
Available through XDA Developers forum for chiron.
Special Considerations
Ceramic Build: The unibody ceramic construction is durable but may affect wireless signals
Bezel-less Design: Innovative design was ahead of its time in 2017
Camera OIS: 4-axis stabilization provides excellent photo stability when properly calibrated
Premium Materials: Ceramic back and aluminum frame provide premium feel
