HyperOS 3.0StableChina

Redmi K70 Ultra HyperOS 3.0 OS3.0.308.0.WNNCNXM

Q: Which Android version does OS3.0.308.0.WNNCNXM use?

This firmware is based on Android 16.0 .

Q: Will installing OS3.0.308.0.WNNCNXM 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.

Stable firmware for the China Redmi K70 Ultra (rothko), released September 30, 2026.

Download OS3.0.308.0.WNNCNXM

Recovery ROM (OTA .zip) · 7.2 GB Install from the phone’s updater app — keeps your data.

MD5: a77e3eb1fccdb1d88e1bb1fba3ef46f4

Download

Fastboot ROM (.tgz) · 9.1 GB Full image for Mi Flash Tool — clean install, unbrick or downgrade.

MD5: 08c69af23aeedcf0f65da94e3cfdb2be

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 K70 Ultra
Codename: rothko
Region: China
Version: OS3.0.308.0.WNNCNXM
OS: HyperOS 3.0
Android: 16.0
Branch: Stable
Released: Sep 30, 2026
Package: Recovery 7.2 GB / Fastboot 9.1 GB

How to install OS3.0.308.0.WNNCNXM

Recovery ROM (recommended, keeps data)

Back up your important data and charge the phone to at least 50%.
Download the Recovery ROM above on your Redmi K70 Ultra.
Open Settings → About phone and tap the HyperOS version card.
Tap the ⋮ menu → Choose update package and select the downloaded .zip file.
Wait for verification, then tap Reboot now. The update takes 10–20 minutes.

Fastboot ROM (clean install, needs unlocked bootloader)

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

Other Redmi K70 Ultra (China) builds

Device page →

Device	Version	Android	Branch	Released
Redmi K70 UltraChina · `rothko`	OS3.0.6.0.WNNCNXM HyperOS 3.0Stable Beta	16.0	Stable Beta	Feb 6, 2026
Redmi K70 UltraChina · `rothko`	OS1.0.13.0.UNNCNXM HyperOS 1.0Stable Beta	14.0	Stable Beta	Jul 15, 2024

Redmi K70 Ultra firmware for other regions

Frequently asked questions

Is OS3.0.308.0.WNNCNXM an official Redmi K70 Ultra update?

Yes. OS3.0.308.0.WNNCNXM is an official Stable HyperOS 3.0 build for the Redmi K70 Ultra (China), released by Xiaomi on September 30, 2026. The download links point directly to Xiaomi’s update servers.

Which Android version does OS3.0.308.0.WNNCNXM use?

This firmware is based on Android 16.0.

Will installing OS3.0.308.0.WNNCNXM 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 (rothko). Cross-region flashing requires an unlocked bootloader and can cause problems.