Xiaomi smartphone owners often face the desire to personalize the look of their device by installing third-party themes from the Themes store. However, like any other content, visual shells can be annoying, contain errors or simply take up valuable space in internal memory.
The process of removing a theme to MIUI is not always obvious to beginners, as the system offers several ways to solve this problem. Some users confuse deletion with simple switching to standard design, leaving the theme files to lie dead weight in the system. In this article, we will discuss in detail all ways to completely get rid of unnecessary theme, free up space and return the phone to the factory look without losing personal data.
It is worth noting that improper actions when working with system registration files can lead to incorrect display of the interface. So it is important to follow the proven algorithms, which we will describe below. We will consider both the standard tools of the MIUI 12 shell and later, and additional methods of cleaning the cache that will help (fully) remove traces of deleted files.
Standard method of removal through the application Topics
The easiest and safest way to remove any downloaded theme is to use the built-in Themes app, which is the system module that manages all visual content, including fonts, wallpaper and icons, and to start the process, you need to find the appropriate icon on your desktop or in the application menu and run it.
After opening the app, go to the bottom right corner of the screen where the Profile button (the human icon) is located. In the menu that opens, select the Topic section. This will show a list of all the visual shells that have ever been installed on your Redmi 9. Find the one you want to get rid of and click on it to go to the control menu.
In the window that opens, you will see the Remove button (often indicated by the basket icon or text link) and click on it and the system will request confirmation of operation. Once confirmed, the theme will be removed from the device, and the phone will automatically switch to the Classic standard design or the theme that was active before installing the deleted one.
- 🗑️ Click on the cart icon next to the theme name for instant removal.
- 🔄 Automatic return to system theme occurs immediately after cleaning.
- 📂 Theme files are deleted from memory, making room for new data.
- ⚙️ You can delete several topics at once by holding one of them with your finger and selecting the rest.
⚠️ Note: If you delete a theme that is currently active, the system may require you to switch to a standard shell first. MIUI Classic before deleting. This is the normal behavior of protecting system files.
It is important to understand that removing a theme through a profile does not affect other personalization elements, such as separately installed fonts or sounds if they were downloaded as independent components. To remove them, you need to go to the appropriate sections within the Themes application. This allows you to flexibly manage the appearance, leaving favorite elements and removing unnecessary ones.
Reset to the factory design of MIUI Classic
Sometimes users are faced with a situation where the theme is deleted, but visual artifacts or interface bugs remain. In such cases, and if you want to quickly return the phone to its original state without manually searching for files, a reset function to the classic theme is used, this action forcefully activates a standard set of icons, fonts and wallpapers, ignoring the settings of third-party shells.
To reset, open the Topic app and go to Profile. At the top of the screen you'll see a thumbnail of the current theme. Often there's a switch button or gear icon. However, the most reliable way is to find an item in the list of installed themes called Classic or Untitled (standard MIUI theme).
After selecting a standard theme, click Apply. The system will redraw the interface, returning all elements to the factory look. This step is especially useful if the downloaded theme contained errors in the code causing lags or mismatching text. Returning to Classic is a "safe mode" for the visual part of the Xiaomi shell.
Remember that resetting a theme does not delete your personal files, photos or contacts. This is a cosmetic procedure. However, if you used widgets specific to a remote theme (for example, a unique clock on your desktop), they may disappear or stop working, since their code was part of the remote package.
☑️ Checking after resetting the topic
In some versions of MIUI, there is the possibility of completely resetting the theme settings through the developer menu or special engineering codes, but for the average Redmi 9 user, the above method through the profile is sufficient.
Remove themes via the phone settings menu
An alternative way to manage themes is through the system menu Settings of the smartphone itself, which is convenient because it does not require the launch of a separate heavy Themes app, which can be useful if the phone is slow or the theme app freezes. Integrating the design settings into a common menu allows you to control the appearance at a deep level.
To use this method, open Settings and scroll through the list to Screen or Wallpaper and personalization (the name may vary depending on the version of MIUI). Inside you will find the Topic item. Clicking on it will take you to the same control menu that was described in the first section, but with faster access.
The removal mechanism is identical: you pick an unnecessary theme, click on it, and select the uninstall option, and the advantage of this path is that it often works even when the main Themes application gives an error when it starts, which is because the system call settings has a higher priority.
| Parameter | Through the Topics app | Through phone settings | Through the Explorer (Files) |
|---|---|---|---|
| Speed of access | Medium | Tall. | Tall. |
| Security | Tall. | Tall. | Low (risk of error) |
| Completeness of removal | Complete. | Complete. | Partial (cache remaining) |
| Recommended method | Yes. | Yes. | No. |
Using the settings menu also allows you to quickly check which theme is active at the moment. If you are confused in the set of shells installed, the path through Settings → Screen → Theme will help you instantly determine the current status and switch to the default option if necessary to eliminate visual noise.
Cleaning cache and residual themes files
Even after properly removing the theme through the standard interface, Redmi 9 memory can still have so-called “tails” – temporary files, thumbnails and cache data – that can take up hundreds of megabytes over time, which is critical for devices with 32 or 64 GB of memory.
The first step is to use the built-in Safety app (green zipper icon) and run it and select Cleanup. The system scans the device for junk files, often including remnants of deleted themes labeled MIUI Theme Cache. Press the Cleanup button to delete them.
For more advanced users, a manual method is available through the file manager. Go to the root of internal memory and find the MIUI folder, then theme. Inside, you can store files with the.mtz extension (theme archives) or folders with the names of the installed themes. Deleting files from this folder manually is only possible for those that are not system and are not active at the moment.
⚠️ Be extremely careful when manually cleaning folders in the directory MIUI. Deleting system files (such as default.mtz) can cause the phone to stop displaying the interface correctly, up to the appearance of a black screen when booting.
It’s also worth checking the Download folder. Often users download themes from third-party sources in.mtz format and forget to delete installation files after use. They can be safely removed manually by highlighting files and selecting the Recycle Bin icon, which will free up additional space without risk to the system.
Where are the theme files stored on Xiaomi?
What to do if the topic is not deleted or hangs
A situation where the delete button does not respond or the process freezes during the loading stage of the theme list is infrequent, but it is possible on Redmi 9 due to a lack of RAM or software failures. In this case, you should not panic or try to restart the phone an infinite number of times. There are proven methods to solve this problem.
The first step is to clear the Topic app itself. Go to Settings → Apps → All Apps. Find the Topic app (or Themes) in the list. Click on it and select Memory, then Clear the data and Clear the cache. This will reset the state of the application, but it won't delete your personal photos or contacts. After that, try to go back to the app and delete the problematic topic.
If the problem persists, it may be that the theme is corrupted and conflicts with the current version of MIUI. Try installing any other, light theme from the official directory, applying it, then removing the problem theme, sometimes replacing the active theme will unlock the management processes.
- 📱 Reboot your smartphone to Safe Mode to remove conflicting theme.
- 🗑️ Clear the cache of the “Themes” application through Android settings.
- 🔄 Set a temporary theme to unlock the removal of the main one.
- 📶 Check your internet connection as deletion may require a license check.
In the rare cases when the interface completely stops responding due to the theme (black screen, endless load), you may need to enter Recovery mode. However, for Redmi 9, a simple wait helps: leave the phone on charge for 15-20 minutes, and the system will try to restore the standard theme when the interface rendering fails.
💡
If standard methods don’t help, try using Google’s Explorer app or built-in Files to find and remove the downloaded theme installation file (.mtz) from the download folder before trying to delete it through the app.
The Impact of Third-Party Themes on Redmi 9 Performance
Redmi 9 owners should know that the Helio G80 processor, while reliable, is not a flagship segment. Heavy themes with live animations, complex widgets and high-resolution graphics can significantly strain the system. Removing such themes is not only a matter of aesthetics, but also a way to get the phone back to its previous speed.
Third-party themes often contain unoptimized code that causes increased energy consumption and heat to the case. If you notice that the phone starts to discharge or brake faster when you unlock the screen, the first thing you should do is remove the last installed theme and return to the standard design of MIUI Classic. This often solves the problems with smoothness of the interface.
In addition, some themes may contain advertising modules or refill redundant resolutions, which is a security threat. Regularly reviewing installed themes and removing unused ones is a good habit to keep your smartphone healthy. Xiaomi’s standard theme is optimized for hardware devices as much as possible and guarantees better autonomy.
⚠️ Warning: Avoid installing themes from unverified sources (forums, third-party sites), especially if they require root rights or install additional plugins.This can lead to unstable system operation and inability to remove the topic by standard methods.
In conclusion, theme management on Xiaomi Redmi 9 is flexible and safe, following the usual instructions. Regular cleaning of visual debris helps to keep the device running at a high level. Don’t be afraid to experiment with the design, but always leave the possibility of a quick rollback to factory settings.
💡
Returning to the standard MIUI Classic theme is the best solution for improving the performance and autonomy of the Redmi 9.