Download Xiaomi 12S Ultra MIUI ROM Latest Update Flash File

Xiaomi 12S Ultra is alternatively referred to by the codename Thor, and MIUI 14, based on Android 13, is the latest firmware update available for Xiaomi 12S Ultra. On this page, you can download the most up-to-date MIUI ROMs for Xiaomi 12S Ultra across China region.

Available Xiaomi 12S Ultra MIUI downloads include:

• Fastboot ROM – Full ROM package for clean installs.
• Recovery ROM – Full ROM package for installs via Recovery.
• OTA Update – Incremental MIUI update.

Detailed guides are provided to install MIUI on Xiaomi 12S Ultra using tools like MiFlash or Recovery.

Download the latest stock Xiaomi 12S Ultra Mi ROM (Mi Firmware) Update for China region from below.

• China ROM for Xiaomi 12S Ultra

Disclaimer: Please be advised that the Xiaomi ROMs are free to download from the official website of miui.com. We only publish links to stock flash files and original updates. All links are official and untouched.

Xiaomi 12S Ultra China MIUI ROM

Download latest Chinese MIUI firmware for Xiaomi 12S Ultra (thor) by Xiaomi.

How to Flash MIUI Fastboot ROM on Xiaomi 12S Ultra (thor)

1. Download and extract the Xiaomi 12S Ultra MIUI Fastboot ROM on your computer. Make sure to check if the ROM file suffix is “.tgz“. If it is “.gz“, please rename it to “.tgz“.
2. Download and extract MIUI ROM Flashing Tool on your computer.
3. Make sure your Xiaomi 12S Ultra’s bootloader is unlocked.
4. Power off and boot Xiaomi 12S Ultra into Fastboot Mode by pressing the Volume Down and Power buttons together until you see the Fastboot logo.
5. Connect your device to computer using USB Cable.
6. Run XiaoMiFlash.exe and select the MIUI Fastboot ROM folder.
7. Click on refresh to detect your device and click on flash to start the flashing process.

Follow the detailed guide on how to flash Fastboot ROM on Xiaomi, Redmi and POCO devices here.

How to Install MIUI Recovery ROM on Xiaomi 12S Ultra (thor) via Stock Recovery without a PC

We can update the Xiaomi 12S Ultra firmware via recovery without using computer. However, the Recovery ROM MIUI version must be higher than your current installed version, as downgrading firmware is blocked by Xiaomi.

While user data is retained when flashing via stock recovery, it’s recommended to backup your Xiaomi 12S Ultra’s data before installing, in case of accidental data loss.

Follow the steps to install MIUI Recovery ROM on Xiaomi 12S Ultra using stock recovery mode:

1. Download the Xiaomi 12S Ultra Recovery ROM zip for your region.
2. Rename the zip file to “update.zip” if the name differs.
3. Transfer the update.zip to the root of your phone’s internal storage.
4. Press and hold the Volume Up and Power buttons together to boot into recovery mode. For some devices you’ll have to press Volume Up, Volume Down and Power buttons to boot into recovery mode.
5. The update will automatically start flashing if the correct ROM zip is detected.
6. Once firmware installation completes, your phone will reboot into the updated MIUI version. User data and apps are retained after the process.

For older Xiaomi phones, you may need to manually select “Install update.zip to System One” from the Recovery menu. After install, exit Recovery and boot into MIUI.

Install MIUI Recovery ROM on Xiaomi 12S Ultra via Software Updater using PC

You can install MIUI firmware updates on your Xiaomi 12S Ultra device using a Windows PC, without needing to unlock the bootloader. This method suits for the situations like: Updating Global Stable ROM from Global Stable ROM, Updating Global Beta ROM from Global Beta ROM, Updating to Global Beta ROM from Global Stable ROM and vice versa.

Follow these steps to flash Recovery ROM on Xiaomi 12S Ultra using a PC:

1. Download the latest Xiaomi 12S Ultra Recovery ROM zip.
2. Connect your phone to the PC using a USB cable.
3. Copy the downloaded ROM zip file to the internal storage on your device, in the “downloaded_rom” folder. If the folder doesn’t exists create it before copying the ROM file.
4. On the phone, open Settings and go to About Phone → System Update.
5. Tap the 3-dot menu (⋮) in the top right and select “Select update package” or “Choose update package“.
6. Choose the Recovery ROM zip file you copied to the phone’s storage.
7. Once you select the ROM file, the update process will start automatically and install the new MIUI firmware version.

This method lets you update MIUI using PC without needing to unlock bootloader or wipe data.

Follow the detailed guide on how to flash Recovery ROM on Xiaomi, Redmi and POCO devices here.

We are not responsible if you have downloaded the Flash File, Full ROM, or the latest OTA update and encounter problems with your device after installation. Install the updates at your own risk.