The Stable update V13.0.4.0.SLACNXM has been officially released for Xiaomi 12S Ultra (codename is thor). Before updating, please make sure you have downloaded the exact ROM matching your Xiaomi phone/tablet. In Fastboot mode, you can check model code by typing fastboot getvar product
in cmd/shell.
The firmware files posted here are all official Xiaomi MIUI or HyperOS ROM, xiaomiROM.com do not own and never modified those firmwares,you will always download the file from Xiaomi server.
You may interest in those contents: Xiaomi 12S Ultra ROM Topics Xiaomi Devices Index
Download Xiaomi 12s ultra (thor) China MIUI 13 V13.0.4.0.SLACNXM Recovery ROM with Android 12.0. Firmware size is 5.7 GB.
Download Xiaomi 12s ultra (thor) China MIUI 13 V13.0.4.0.SLACNXM Fastboot ROM with Android 12.0. Firmware size is 7.6 GB.