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Redmi K90 Ultra
HyperOS 4.0StableChina

Redmi K90 Ultra HyperOS 4.0 OS4.0.3.0.XHPCNXM

Stable firmware for the China Redmi K90 Ultra (warsaw), released October 29, 2026.

Download OS4.0.3.0.XHPCNXM

Recovery ROM (OTA .zip) · 9.0 GB Install from the phone’s updater app — keeps your data.
MD5: 5e9493a2309d2d5b3aef3fe75ffc65cb
Download
Fastboot ROM (.tgz) · 11.8 GB Full image for Mi Flash Tool — clean install, unbrick or downgrade.
MD5: ce40c03c7eeb60cea52832d5afb8e618
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 K90 Ultra
Codename
warsaw
Region
China
Version
OS4.0.3.0.XHPCNXM
OS
HyperOS 4.0
Android
17.0
Branch
Stable
Released
Oct 29, 2026
Package
Recovery 9.0 GB / Fastboot 11.8 GB

How to install OS4.0.3.0.XHPCNXM

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 K90 Ultra.
  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 K90 Ultra (China) builds

Device page →
DeviceVersionAndroidBranchReleased
Redmi K90 UltraChina · warsawOS3.0.302.0.WHPCNXM
HyperOS 3.0Stable Beta
16.0Stable Beta

Frequently asked questions

Is OS4.0.3.0.XHPCNXM an official Redmi K90 Ultra update?
Yes. OS4.0.3.0.XHPCNXM is an official Stable HyperOS 4.0 build for the Redmi K90 Ultra (China), released by Xiaomi on October 29, 2026. The download links point directly to Xiaomi’s update servers.
Which Android version does OS4.0.3.0.XHPCNXM use?
This firmware is based on Android 17.0.
Will installing OS4.0.3.0.XHPCNXM 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 (warsaw). Cross-region flashing requires an unlocked bootloader and can cause problems.