Installation MTZ-Xiaomi-themed MIUI 14: All working methods (2026)

Introduction: Why to Install MTZ-topical MIUI 14

.mtz files are archives of MIUI themes that allow you to completely change the appearance of the system, from icons and fonts to animations and sounds. In MIUI 14, Xiaomi tightened restrictions on installing third-party themes, but workarounds remained. This article covers all current methods of installing MTZ on devices with MIUI 14, including official and alternative methods.

The main problem with users is the “Failure to apply theme” error when trying to install a downloaded.mtz file, which is due to blocking unsigned themes in new versions of MIUI. We will discuss how to circumvent this restriction without the risk of “bricking” the device, and also consider a unique method through ADB for MIUI 14.0.3+, which does not require root rights.

Importantly, the procedure is different for Chinese (China ROM) and global (Global/EEA ROM) firmware, and the article provides instructions for both options, taking into account the latest security updates from Xiaomi (May 2026 patch).

Preparation of the device before installation MTZ-topic

Before you start, you need to follow a few critical steps to avoid errors like "Parse error" or "Theme corrupted."

• 📱 Check the version. MIUI: Go to Settings. → The phone. → Version. MIUI. The instructions are suitable for MIUI 14.0.1–14.0.6 For newer versions (14.1)+) Additional actions may be required.
• 🔒 Unlock the bootloader (if you plan to use it) TWRP): Xiaomi's official website requires permission to unlock through Mi Account, which takes up to 72 hours.
• 📁 Download the verified MTZ-Use only files from trusted sources, such as the official Xiaomi theme store or forums 4PDA/XDA Developers: Avoid those with suspiciously low weight (less than that). 5 MB).
• 🔧 Put the debugging on. USB: Activate the developer mode (7 taps according to the version) MIUI), Then turn on the debugging. USB and Allow unlocking OEM In Settings → Additionally. → For developers.

On devices with MIUI 14 and Snapdragon 8 Gen 2 processor (such as Xiaomi 13 Pro), unlocking can cause data resets of all partitions, including internal memory. We recommend backing up in advance through Settings → Google → Backup.

⚠️ Note: On HyperOS devices (e.g. Xiaomi 14) installation methods MTZ These models require converting themes to.hmt.

Method 1: Install MTZ through an official theme store

The safest way is to use the built-in theme store, but it is only suitable for those moderated by Xiaomi.

1. Open the Themes app (icon with brush).
2. Go to the Profile section → My subjects. → Local.
3. Click on the + icon in the upper right corner and select the downloaded.mtz file.
4. Confirm installation. If the theme is compatible, it will appear on the local themes list.

If after selecting the file, an error appears "I failed to unpack the theme", try the following steps:

• 🔄 Rename the file by removing the Cyrillic alphabet and special characters (for example, theme_v2.mtz instead of Super Theme! @#.mtz).
• 📥 Re-download the file - it may have been corrupted when downloaded.
• 🛠️ Check the integrity of the archive through the program 7-Zip (Open.mtz like ZIP-archive).

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If the theme is set but does not apply to icons, try manually selecting it in the launcher settings: long tap on the desktop → Style of icons → Current theme.

Method 2: Installation via TWRP (for unlocked bootloader)

This is a good way to use a custom recovery system that is unlocked and has custom recovery installed, and the advantage of this method is that you can install any.mtz file without checking your signature.

Download TWRP for your model|Transfer the.mtz file to the folder /sdcard/MIUI/theme|Make a backup of the current theme|Charge your phone at least to 50%-->

1. Reset the device to recovery mode: turn off the phone, then press Power + Volume up.
2. In TWRP, select Advanced → File Manager.
3. Go to the folder. /data/system/theme/ and delete the file theme_manager_data.xml (It'll cache theme).
4. Back to the main menu TWRP and select Install, then specify the path to the.mtz file (e.g, /sdcard/MIUI/theme/your_theme.mtz).
5. Confirm the swipe installation and restart the device.

After the reboot, the theme should appear in the list of local themes. If the icons or fonts have not changed, follow the following steps:

1. Open the Topic app.
2. Go to Profile → Settings → Reset theme settings.
3. Use the subject again.

⚠️ Note: On some devices (e.g. Redmi Note 12 Pro)+) after installing the TWRP The firmware region may fly. Before the procedure, check the current region in Settings. → Additionally. → Region and write it down.

Method 3: Installation via ADB (without root)

For users who don't want to unlock the bootloader, there's a method through ADB (Android Debug Bridge) that runs on MIUI 14 with a security patch no newer than March 2026.

• 🖥️ Computer with installed ADB Tools.
• 📱 Included debugging by USB phone-on.
• 🔌 Cable USB (preferably original).

Instructions:

1. Connect the phone to the PC and confirm the debugging permission.
2. Open the command prompt (Windows) or terminal (macOS/Linux) in the folder with adb.exe.
3. Execute the command to copy the theme to the system folder: adb push C:\path\to\theme.mtz /sdcard/MIUI/theme/
4. Set file rights: adb shell chmod 644 /sdcard/MIUI/theme/theme.mtz
5. Apply the topic through ADB: adb shell am start -n com.android.themes/.activity.ThemePreviewActivity -d file:///sdcard/MIUI/theme/subject

If the theme does not apply after completing the commands, check the logs through:

adb logcat | grep -i theme

The error "Permission denied" means that your firmware has blocked access to the system folders, in which case only unlocking the bootloader will help.

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method ADB It only works on firmware with a security patch level no newer than March. 2026. Newer versions require a modified version. theme_manager.apk.

Solving Common Errors When Installing MTZ

Even if you follow the instructions correctly, users are faced with errors, and here are the most common problems and solutions:

For the error "Theme not compatible with this device" try the following:

1. Open the.mtz file through the archiver and find the config.json file.
2. Change the parameter "min_api" the value corresponding to your version MIUI (for example, "min_api": 14 for MIUI 14).
3. Save the changes and repackage the archive to.mtz.

If after using the theme, wallpaper or sounds are lost, check the presence of files in the folders:

• /sdcard/MIUI/theme/[theme_name]/wallpaper/ — wallpaper
• /sdcard/MIUI/theme/[theme_name]/audio/ — sound

How to create a backup of the current theme

Before experimenting with themes, it is recommended to save the current theme of the system.

Method 1: Through the Application Topics

1. Open the Topic app.
2. Go to Profile. → My subjects.
3. Find the current theme (usually called Default or System) and click on it.
4. Choose Export and save the file to a safe location.

Method 2: Through ADB (for system themes)

Follow the command:

adb pull /data/system/theme/ com.android.theme.bak

This will create a local copy of the theme system files in the com.android.theme.bak folder on your PC.

⚠️ Note: Backup copies of topics created on MIUI 14, not compatible with older versions of the shell (MIUI When restored to another version of the system, graphic artifacts may arise.

FAQ: Frequent questions about installing MTZ on MIUI 14