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Mi MIX 2S
MIUI 12.5StableChina

Mi MIX 2S MIUI 12.5 V12.5.1.0.QDGCNXM

Stable firmware for the China Mi MIX 2S (polaris), released July 16, 2021.

Download V12.5.1.0.QDGCNXM

Recovery ROM (OTA .zip) · 2.2 GB Install from the phone’s updater app — keeps your data.
MD5: 8326b14c82af27ae95b6ed7e13b725a1
Download
Fastboot ROM (.tgz) · 3.0 GB Full image for Mi Flash Tool — clean install, unbrick or downgrade.
Download

Files are served from Xiaomi’s official servers. Compare the MD5 checksum after downloading to make sure the file is complete and untouched.

Firmware details

Device
Mi MIX 2S
Codename
polaris
Region
China
Version
V12.5.1.0.QDGCNXM
OS
MIUI 12.5
Android
10.0
Branch
Stable
Released
Jul 16, 2021
Package
Recovery 2.2 GB / Fastboot 3.0 GB

How to install V12.5.1.0.QDGCNXM

Recovery ROM (recommended, keeps data)

  1. Back up your important data and charge the phone to at least 50%.
  2. Download the Recovery ROM above on your Mi MIX 2S.
  3. Open Settings → About phone and tap the MIUI version card.
  4. Tap the ⋮ menu → Choose update package and select the downloaded .zip file.
  5. Wait for verification, then tap Reboot now. The update takes 10–20 minutes.

Fastboot ROM (clean install, needs unlocked bootloader)

  1. Make sure the bootloader is unlocked and install Mi Flash Tool plus the Xiaomi USB drivers on a Windows PC.
  2. Download and extract the Fastboot ROM (.tgz) to a short path such as C:\rom.
  3. Power off the phone, hold Volume Down + Power to enter Fastboot mode and connect it via USB.
  4. In Mi Flash Tool select the extracted folder, choose clean all (wipes data) and avoid “clean all and lock” unless you want to relock.
  5. Click Flash and wait until the tool shows success; the phone reboots automatically.

Other Mi MIX 2S (China) builds

Device page →
DeviceVersionAndroidBranchReleased
Mi MIX 2SChina · polaris20.9.4
MIUI BetaWeekly
10.0Weekly
Mi MIX 2SChina · polaris9.9.3
MIUI BetaWeekly
9.0Weekly

Mi MIX 2S firmware for other regions

Frequently asked questions

Is V12.5.1.0.QDGCNXM an official Mi MIX 2S update?
Yes. V12.5.1.0.QDGCNXM is an official Stable MIUI 12.5 build for the Mi MIX 2S (China), released by Xiaomi on July 16, 2021. The download links point directly to Xiaomi’s update servers.
Which Android version does V12.5.1.0.QDGCNXM use?
This firmware is based on Android 10.0.
Will installing V12.5.1.0.QDGCNXM erase my data?
Installing the Recovery package through the updater app keeps your apps and data. Flashing the Fastboot package with “clean all” wipes the phone — back up first.
Can I install this on another region’s device?
Only install firmware that matches your device’s region (China) and codename (polaris). Cross-region flashing requires an unlocked bootloader and can cause problems.