Xiaomi 12S Ultra Update

Xiaomi 12S Ultra

Xiaomi 12S Ultra firmware (codename thor) is presented by stable MIUI versions to install through a Fastboot, Recovery, or OTA Update.

Phone model numbers: 2203121C (China). Stock ROM is downloaded free of charge from the official website bigota.d.miui.com. We don't store Xiaomi ROMs not make any changes to the original links flash files.

Download the latest MIUI update and older versions for the following regions below:


Latest stable Chinese firmware for Xiaomi 12S Ultra by Xiaomi.

Recovery ROM

MIUI 13 (Pilot)
Android 12
Release date
File size
5.70 GB
Official Link
Download (.zip)

The latest firmware version doesn’t necessarily mean it’s the best. Read the reviews on the 4PDA or XDA Developers websites before installing any updates to Xiaomi 12S Ultra. If you downloaded the flash file, installed firmware and encountered operation problems, please write about it in the comment section.

Xiaomi releases monthly and quarterly security patch updates for the Xiaomi, Redmi and POCO for 2 years after the device goes to market. Monthly and quarterly security updates include Android security patches from Google as well as fixes for specific issues from Xiaomi.

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