This page lists the latest official firmware for the Mi MIX 2S (codename polaris) in 3 regions: Global, Russia, China. Every file links to Xiaomi’s own update servers and is checked against Xiaomi’s MD5 checksum.
- Codename
polaris - Newest stable build V12.5.1.0.QDGCNXM (China, Jul 16, 2021)
- OS MIUI 12.5, Android 10
- Software support Security updates ended in March 2021 (Xiaomi)
- Last checked Nov 8, 2026 22:37
Mi MIX 2S Firmware Downloads
Mi MIX 2S Global ROM
| Version | Type | Branch | Size | Released | |
|---|---|---|---|---|---|
| V12.0.3.0.QDGMIXM MIUI 12 · Android 10 |
Recovery ROM (.zip) | Stable | 2.0 GB | Jan 4, 2021 | Download |
| V12.0.3.0.QDGMIXM MIUI 12 · Android 10 |
Fastboot ROM (.tgz) | Stable | 2.6 GB | Dec 28, 2020 | Download |
| 9.6.27 MIUI weekly · Android 9 |
Recovery ROM (.zip) | Weekly (developer) | 2.0 GB | Jun 28, 2019 | Download |
| 9.6.27 MIUI weekly · Android 9 |
Fastboot ROM (.tgz) | Weekly (developer) | 2.7 GB | Jun 28, 2019 | Download |
Mi MIX 2S Russia ROM
| Version | Type | Branch | Size | Released | |
|---|---|---|---|---|---|
| V12.0.2.0.QDGRUXM MIUI 12 · Android 10 |
Recovery ROM (.zip) | Stable | 2.0 GB | Dec 22, 2020 | Download |
| V12.0.2.0.QDGRUXM MIUI 12 · Android 10 |
Fastboot ROM (.tgz) | Stable | 2.6 GB | Dec 15, 2020 | Download |
Mi MIX 2S China ROM
| Version | Type | Branch | Size | Released | |
|---|---|---|---|---|---|
| V12.5.1.0.QDGCNXM MIUI 12.5 · Android 10 |
Recovery ROM (.zip) | Stable | 2.2 GB | Jul 16, 2021 | Download |
| V12.5.1.0.QDGCNXM MIUI 12.5 · Android 10 |
Fastboot ROM (.tgz) | Stable | 3.0 GB | Jul 7, 2021 | Download |
| 20.9.4 MIUI weekly · Android 10 |
Recovery ROM (.zip) | Weekly (developer) | 2.3 GB | Sep 4, 2020 | Download |
| 9.9.3 MIUI weekly · Android 9 |
Fastboot ROM (.tgz) | Weekly (developer) | 2.8 GB | Sep 4, 2019 | Download |
Firmware data: official Xiaomi servers, tracked by XiaomiFirmwareUpdater.
Which ROM Does My Mi MIX 2S Need?
Open Settings → About phone and look at the OS version. The two letters before XM at the end show your region:
| Region | Ends with | Example |
|---|---|---|
| Global | MIXM |
V12.0.3.0.QDGMIXM |
| Russia | RUXM |
V12.0.2.0.QDGRUXM |
| China | CNXM |
V12.5.1.0.QDGCNXM |
Install a ROM of the same region your phone already runs. A different region needs an unlocked bootloader and a Fastboot ROM.
How to Install Mi MIX 2S Firmware
Recovery ROM (no PC, keeps your data)
- Download the Recovery ROM (
.zip) for your region and move it to the root of the internal storage. - Open Settings → About phone, tap the OS version card, then the three dots → Choose update package.
- Select the ZIP and wait until the phone installs it and reboots.
Fastboot ROM (PC, clean install)
- Unlock the bootloader first: HyperOS bootloader unlock guide.
- Install ADB, Fastboot and USB drivers and Mi Flash Tool.
- Extract the
.tgzwith 7-Zip, boot the phone into Fastboot (Power + Volume Down) and check the codename withfastboot getvar product: it must saypolaris. - Select the ROM folder in Mi Flash, choose Clean all and click Flash.
Warning: never use Clean all and lock with a ROM from a different region or with any modified software. Re-locking a mismatched phone makes it unbootable.
Mi MIX 2S Guides and ROMs on Xiaomi Firmware
FAQ
What is the latest firmware for the Mi MIX 2S?
- Global: V12.0.3.0.QDGMIXM (Stable, Jan 4, 2021)
- Russia: V12.0.2.0.QDGRUXM (Stable, Dec 22, 2020)
- China: V12.5.1.0.QDGCNXM (Stable, Jul 16, 2021)
How long will the Mi MIX 2S get updates?
Xiaomi’s official support list shows that security updates for the Mi MIX 2S (listed as “Mi MIX 2S”) ended in March 2021. The firmware on this page is the final official release, so no new updates are expected. Source: Xiaomi Security Center.
Are these files official?
Yes. Every download goes straight to Xiaomi’s servers (bigota.d.miui.com or Xiaomi’s Aliyun storage). We don’t host or modify the files. Compare the MD5 shown on the download page after downloading.
Recovery or Fastboot ROM: which one should I download?
Use the Recovery ROM to update without a PC and keep your data. Use the Fastboot ROM with Mi Flash to fix a bootloop, change region or do a clean install. It needs an unlocked bootloader and erases the phone.