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Redmi K100 Pro Max
HyperOS 4.0StableChina

Redmi K100 Pro Max HyperOS 4.0 OS4.0.4.0.XGNCNXM

Stable firmware for the China Redmi K100 Pro Max (songyuan), released October 17, 2026.

Download OS4.0.4.0.XGNCNXM

Recovery ROM (OTA .zip) · 10.0 GB Install from the phone’s updater app — keeps your data.
MD5: 25df7572bd50aaddc896b54a4cf1cdf2
Download
Fastboot ROM (.tgz) · 12.9 GB Full image for Mi Flash Tool — clean install, unbrick or downgrade.
MD5: 956b555e67d3cff82ff528af73fc4451
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
Redmi K100 Pro Max
Codename
songyuan
Region
China
Version
OS4.0.4.0.XGNCNXM
OS
HyperOS 4.0
Android
17.0
Branch
Stable
Released
Oct 17, 2026
Package
Recovery 10.0 GB / Fastboot 12.9 GB

How to install OS4.0.4.0.XGNCNXM

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 Redmi K100 Pro Max.
  3. Open Settings → About phone and tap the HyperOS 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 Redmi K100 Pro Max (China) builds

Device page →
DeviceVersionAndroidBranchReleased
Redmi K100 Pro MaxChina · songyuanOS3.0.301.0.WGNCNXM
HyperOS 3.0Stable Beta
16.0Stable Beta

Redmi K100 Pro Max firmware for other regions

Frequently asked questions

Is OS4.0.4.0.XGNCNXM an official Redmi K100 Pro Max update?
Yes. OS4.0.4.0.XGNCNXM is an official Stable HyperOS 4.0 build for the Redmi K100 Pro Max (China), released by Xiaomi on October 17, 2026. The download links point directly to Xiaomi’s update servers.
Which Android version does OS4.0.4.0.XGNCNXM use?
This firmware is based on Android 17.0.
Will installing OS4.0.4.0.XGNCNXM 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 (songyuan). Cross-region flashing requires an unlocked bootloader and can cause problems.