The Xiaomi Mi MIX 2 (codename chiron), launched in 2017, was the device that refined the revolutionary bezel-less concept of the original Mi MIX and made it more practical for everyday use. As the successor to a true concept phone, it featured a stunning four-sided curved ceramic body and a beautiful full-screen display with minimal bezels. Powered by the flagship Qualcomm Snapdragon 835 chipset, the Mi MIX 2 delivered top-tier performance and solidified the MIX series as Xiaomi’s pinnacle of design innovation. For owners of this iconic device, this page provides the official fastboot ROMs for China and Global, the popular Xiaomi.eu custom ROM, and two versions of the TWRP recovery required for advanced modifications.
Important: You must verify your device is a Mi MIX 2 (chiron). This firmware is not compatible with the original Mi MIX (lithium) or the later Mi MIX 2S (polaris), which has a different processor and camera system. Flashing the wrong firmware will hard brick your phone.
Quick Device Specs
- Device: Xiaomi Mi MIX 2 (chiron)
- Release year: 2017
- Chipset: Qualcomm Snapdragon 835
- Display: 5.99″ IPS LCD, Full Screen Display
- Battery: 3400 mAh, 18W fast charging
- Original MIUI: Android 7.1 (Nougat), MIUI 9
Required Downloads
| File / Tool | Download Link |
|---|---|
| Xiaomi Mi Flash Tool | Download Latest Version |
| Xiaomi USB Drivers | Included with Mi Flash Tool |
| Bootloader Unlock Tool | Official Mi Unlock Page |
Official & Custom ROMs / Recovery
| Region | Build | Android | Type | Download | Codename |
|---|---|---|---|---|---|
| China | V12.0.1.0.PDECNXM | 9.0 | Official Fastboot ROM | Download | chiron |
| Global | V12.0.1.0.PDEMIXM | 9.0 | Official Fastboot ROM | Download | chiron |
| Xiaomi.eu (Custom) | V12.0.1.0.PDECNXM (Based) | 9.0 | Custom Recovery ROM | Download | chiron |
| TWRP (Official) | 3.3.1-1 | — | Custom Recovery | Download | chiron |
| TWRP (wzsx150 Build) | 3.3.2B | — | Custom Recovery | Download | chiron |
How to Flash Official ROM (Mi Flash Tool)
Use this method to unbrick your phone or restore official MIUI firmware.
- Boot into Fastboot mode (Power + Volume Down).
- Extract the official firmware (.tgz file) and select the main folder containing the
/imagesdirectory in Mi Flash Tool. - Select clean all for a safe installation (you can use clean all and lock to return to a fully stock, locked state).
How to Install TWRP & Flash Custom ROMs
Use this method to install the Xiaomi.eu custom ROM or other community-developed ROMs.
What is TWRP? TWRP (Team Win Recovery Project) is a powerful custom recovery that replaces your phone’s limited stock recovery. It is the essential tool that allows you to install custom software (.zip files), create full backups of your system (a “Nandroid”), and perform other advanced maintenance. The official ROMs on this page do not require TWRP.
Disclaimer: This is an advanced process. Proceed at your own risk.
- Unlock the Bootloader: This is a mandatory first step. Use the official Mi Unlock Tool.
- Flash TWRP:
- Download your preferred TWRP version. The Official build is recommended for stability.
- Boot your phone into Fastboot mode (Power + Volume Down) and connect it to your PC.
- Using ADB & Fastboot tools on your PC, flash the TWRP
.imgfile with the command:
fastboot flash recovery twrp-filename.img
- Boot into TWRP: After flashing, immediately boot into recovery by holding Power + Volume Up.
- Install Custom ROM:
- In TWRP, it’s recommended to first go to “Wipe” and select “Format Data” to prevent encryption issues.
- Transfer the Xiaomi.eu .zip ROM file to your phone.
- In TWRP, tap “Install,” select the .zip file, and swipe to confirm the flash.
- Reboot your system once complete.
FAQs
Q1. What was the main design philosophy behind the Mi MIX 2?
The goal was to take the revolutionary but massive concept of the original Mi MIX and refine it into a more compact, ergonomic, and durable phone for daily use, without sacrificing the stunning full-screen design.
Q2. Can I flash a Mi MIX 2S (polaris) ROM on my Mi MIX 2?
No, absolutely not. The Mi MIX 2S has a more powerful Snapdragon 845 processor and a completely different dual-camera system. Their firmwares are not interchangeable.
Q3. What was the final official update for the Mi MIX 2?
The Mi MIX 2 launched with Android 7.1 Nougat and received its final major OS upgrade to Android 9 Pie. The MIUI 12 builds provided here are the last official software updates for this model.
Q4. Why are there two TWRP versions listed? Which one should I use?
The table lists both the Official TWRP from the main project website and a popular third-party build (by wzsx150). For most users, the Official build is the recommended starting point due to its proven stability. Different builds sometimes offer compatibility with specific ROMs or Android versions, which is why alternatives exist.
Troubleshooting
- Drivers: If your PC does not recognize the phone in fastboot mode, reinstall the Xiaomi USB drivers and run Mi Flash Tool as Administrator.
- Fastboot errors:
- “error: not catch checkpoint” → This common error means you have selected the wrong folder. In Mi Flash Tool, be sure to select the parent folder that was created when you extracted the .tgz file, not the images folder inside it.
- “Anti rollback error” → You are attempting to flash an older firmware version than what is currently on the device. Xiaomi’s Anti-Rollback Protection (ARB) prevents this.
- TWRP Issues:
- TWRP asks for a password → This means your phone’s storage is encrypted. The standard fix is to go to the “Wipe” menu in TWRP and choose “Format Data”. This will erase everything on your internal storage.
- Stuck on boot after flashing → If the phone doesn’t boot up after flashing a custom ROM, reboot to TWRP, perform a full wipe (Cache, Dalvik, System, Data), and then re-flash the ROM .zip file.
