Xiaomi’s modern smartphones are famous for their flexibility in customizing the visual interface, based on an integrated system component that users often refer to as “Themes,” not just a set of images, but a full-fledged engine that can completely transform the appearance of the MIUI or HyperOS operating system.
Many device owners encounter this tool by accident, changing wallpapers, or purposefully looking for a way to change app icons. Understanding how the Themes app works opens up access to hundreds of free designs, allowing you to personalize the gadget to your liking without having to get super-user rights.
In this article, we will take a closer look at the functionality of the built-in design store, where to look for hidden settings, how to solve the problem of disappearing an icon, and why some themes may not work correctly on your device.
The main purpose and functionality of the system component
Themes is a native part of Xiaomi’s software shell, and its primary focus is managing the visual style of the interface. Unlike third-party launchers that replace the desktop entirely, the system app works at a deeper level, changing system fonts, transition animations, settings menu icons, and even notification center controls.
The functionality of this tool goes far beyond simply changing wallpapers. The user can download complex design packages that change the design of the locking hours, soundtracks and the style of the fast access curtain. MIUI Themes supports both automatic installation of downloaded packages and manual adjustment of individual design elements.
It's important to note that the app is tightly integrated with your Mi Account. It allows you to sync purchased or downloaded themes between devices. If you change your phone, just log in to your profile to return the familiar design in a couple of clicks. However, it's worth considering that some elements may differ on models with different screen diagonals.
Security is also worth mentioning: all the themes available in the official store are moderated, which ensures that there is no malicious code that could theoretically be hidden in third-party launchers, and the system theme is the safe customization method recommended by the manufacturer.
Where to find the Themes app and how to launch it
By default, the app shortcut is present on the home screen or in the menus of all programs, usually called "Themes" and a characteristic icon with a brush or abstract symbol, but users often lose access to it after accidentally removing the shortcut or resetting the launcher settings.
If you can't find an icon on your desktop, try using the built-in search. Swipe your finger down (or up, depending on your navigation settings) and type the word "Themes" or "Themes" into the search bar. The system will automatically find the hidden app and prompt you to open it.
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If the search doesn't find the application, it may be disabled in the system settings. Try searching for "Applications" and find Themes in the list of installed programs.
There is also a direct path through the settings menu. Go to Settings → Lock screen and wallpaper → Themes. This path may vary slightly depending on the firmware version, but the logic remains the same: the appearance settings always lead to the theme catalog.
In some cases, especially on global firmware versions, the application can be hidden in the Tools folder. Carefully look at the folders with system utilities, often users forget to look there. If the application was removed, it can be returned by resetting the launcher settings or updating the system components.
How to change or remove the set topic
The process of changing the design is as simple as possible for the user's convenience, after selecting the design in the directory, just click the "Download" button and then "Apply" button. The system automatically replaces the current set of icons and fonts with new ones, the entire process takes a few seconds.
To get back to standard, you need to open the Tem app and go to the "My" section (usually the human icon in the lower right corner), where you select the "Themes" tab, and the list will be "Classic" or "Default", which is Xiaomi's factory decoration.
☑️ Algorithm of the theme change
Removing downloaded themes is similar, so in the My Themes section, you press and hold your finger to preview unnecessary design, and you get a menu where you can choose to delete themes, and this helps to make room in your internal memory, because you have quality themes from the top of your head. 4K-The wallpaper can take up a significant amount of.
Sometimes, after applying a new theme, some third-party icons remain unchanged. This is normal, since the theme designer may not have rendered graphics for all existing applications. Theme settings often have an option called “Icon Compatibility” that tries to adapt other people’s icons to the overall style.
Configuring components: fonts, wallpaper and lock screen
The Themes app allows you to change not only the global style, but also the individual components, so you can create a unique combination without installing the whole theme, for example, you may like the font from one theme and the lock screen from another.
To access these settings, you need to go to the "My" section and select the appropriate category: "Fonts", "Wallpaper", "Block screen" and there is a huge selection of free content available, and font customization is especially popular, because it allows you to improve the readability of the text or just add personality.
| Component | What changes | Impact on the battery |
|---|---|---|
| Global theme | Icons, colors, sounds, fonts | Minimum |
| Live wallpaper | Desktop background (animation) | Medium/High |
| Fonts | Displaying text throughout the system | Absent. |
| Lock screen | View of widgets and clocks with the screen off | Depends on the complexity. |
You should pay special attention to the live wallpaper. It looks spectacular, but it consumes more CPU and screen power. If you notice that the smartphone starts to discharge faster after changing the background, try to return to a static image. In the battery settings, you can track the energy consumption of the wallpaper component.
Secret codes for themes
Solution: App is gone or not working
One of the most common problems is the sudden disappearance of the application icon, often after a system update or a launcher cache is cleared, so you don't have to panic and look for ways to flash it. The theme component is system-based and doesn't get deleted completely without root rights.
If the app doesn't start or crashes immediately after opening, try clearing its data. Go to Settings → Apps → All Apps → Themes. In the menu that opens, select "Clean" and click "Clear All Data." This will reset the app's cache to factory state.
⚠️ Warning: Cleaning the Topic app data will reset your personalized design settings. Before doing this, make sure you remember the name of your current theme to quickly restore it.
In some regions (e.g. India or Europe), the content in the theme store may differ from the Chinese version. If you see a "Region Not Supported" message or a blank list of topics, check the region settings in the phone menu. Changing the region to "India" or "Singapore" often solves the problem of accessing the directory.
There may also be problems with the incompatibility of the Android version, if you upgrade to Android 13 or 14 and the Theme app is still from the old version, there may be conflicts, in which case you need to wait for the system components to update through the “Component Update” menu.
Third-party topics and installation safety
The official store is not the only source of design. There are thousands of third-party themes with advanced functionality on the Internet. However, installing such files (usually with the extension.mtz) requires caution. They can contain code errors that lead to a bootloop (cyclic reboot) of the phone.
To install third-party themes, special permissions are often required through a computer and ADB-The security of data when using unverified sources is not guaranteed. Attackers can insert scripts into the topic code that collect information about user actions.
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Use only trusted sources to download third-party themes, such as 4PDA or XDA Developers forums, and always check other users' comments before installing.
If the phone starts to behave inadequately after installing a third-party theme, you need to immediately boot into safe mode. In this mode, third-party themes are not activated, which will allow you to delete the problematic file through the file manager or the standard TEM application.
⚠️ Warning: Deep Themes can disrupt system applications such as Phone or Messages. Always back up important data before experimenting with third-party software.
Users who are not sure about their knowledge should limit themselves to the official catalog, which is regularly updated by professional designers and tested for compatibility with current versions of MIUI, which will save potential headaches and waste time on the system recovery.
Optimization of work and impact on productivity
Many people wonder if the use of complex themes affects the speed of a smartphone. On modern Snapdragon and MediaTek processors, the difference is almost invisible. However, on budget models with little RAM, heavy themes with many animations can cause micro-latency.
If you notice that the interface has become slower after changing the design, try turning off animations in the theme settings or select a lighter design. Also helps to disable the function "Advanced memory" for the application itself Theme, if such an option is available in the system settings.
Regularly cleaning the cache of the Tem application helps keep it running, over time, thumbnails and temporary files of previously downloaded designs accumulate in folders, removing them frees up space and speeds up the opening of the directory.
Hidden function
In conclusion, the Themes app is a powerful tool that makes using a Xiaomi smartphone a unique experience.Using its features properly allows you to refresh the experience of the device without financial costs, the main thing is to balance beauty and functionality, and also remember to be safe when installing third-party content.