Is OS3.0.309.0.WOACNXM stable for daily use?

This is an official firmware release. All official releases from FirmwareMirror are stable and tested. Always backup your data before flashing any firmware.

Is this firmware the latest version?

Yes, OS3.0.309.0.WOACNXM is the version shown. Check FirmwareMirror regularly for newer versions of Xiaomi 15 Ultra China firmware.

Download Xiaomi 15 Ultra China ROM - OS3.0.309.0.WOACNXM (China)

Name: OS3.0.309.0.WOACNXM for Xiaomi 15 Ultra China
Availability: InStock
Author: Xiaomi

Android Version

16.0

File Size

10 GB

Release Date

Jul 09, 2026

Flash Method

Recovery

Download ROM

Available

Download Now

File Size: 10 GB

Verification & Details

MD5 Checksum:

4388015afd369b0a896883ad8d4b893b

How to Flash Recovery on Xiaomi 15 Ultra China

Please follow these steps carefully to install the OS3.0.309.0.WOACNXM update safely. Ensure your device has at least 60% battery.

Download the OS3.0.309.0.WOACNXM Recovery ROM (.zip file).
Transfer the file to the internal storage root directory of your Xiaomi 15 Ultra China.
Navigate to Settings > About Phone > System Update.
Tap the OS logo 10 times to enable advanced features.
Tap the top-right menu icon and select 'Choose update package'.
Select the downloaded zip file and wait for the automated installation to complete.

Back to Xiaomi 15 Ultra China

Download Xiaomi 15 Ultra China Firmware (OS3.0.309.0.WOACNXM)