How to turn off the theme on Xiaomi Redmi 9T: the complete guide

Modern MIUI shells offer users a huge opportunity to customize the interface, allowing you to turn the standard Redmi 9T into a unique device with a personal design. However, it often happens that the designs downloaded from the Themes catalog are too overloaded, contain intrusive advertising or simply cease to please the owner of the gadget after a while. There is a natural desire to return everything to the factory settings, but the standard menus do not always offer an obvious “disconnect” button.

The process of deactivating third-party design may not be obvious to beginners, since the logic of the application “Themes” has its nuances. In this article, we will discuss in detail all the available ways to reset visual style, including system methods and work through hidden debugging menus. You will learn how to clean the system of “garbage” left by heavy fonts and icons, and return your smartphone to its original speed.

It is important to understand that turning off the theme is not just a change of picture, but a process that affects the system files of the interface. Wrong actions can lead to the “merge” of icons or the appearance of artifacts on the screen. That is why we have prepared the most detailed instructions that will protect your Xiaomi Redmi 9T from software errors in the process of returning to the classic style.

Why there is a need to reset the design

Users often find that when a new theme is installed, the interface becomes less responsive, which is because many third-party designers use highly detailed graphics elements that put extra strain on the device’s processor and RAM, resulting in animations that slow down and battery life is shortened.

Another common problem is that third-party shells are incompatible with MIUI updates. After another security patch or Android version update, some elements of the theme may not display correctly: signatures disappear, icons become white squares, and system fonts “float”, in which case the only way out is to force back to stock settings.

⚠️ Note: Some topics, especially those from third-party sources, may contain malicious code or scripts that collect user data. If you notice strange behavior after installing the design, delete it immediately.

Visual noise is also worth mentioning: bright colors and complex graphics can quickly tire the eyes, especially when using a smartphone at night. The standard MIUI theme was designed with ergonomics and readability in mind, so returning to it often solves the discomfort of reading text.

Standard method of disconnection through the Topics app

The easiest and safest way to get back to the original look is to use the built-in Themes app, which is preinstalled on every Xiaomi device and allows you to manage all the visual content, and you first need to open the app using a shortcut on your desktop or by finding it in the Tools folder.

When you start the app, look at the bottom navigation bar, and you're interested in the Profile section, which is usually marked by the little man icon, and when you go to this section, you'll see a list of all the components you've installed: themes, wallpaper, ringtones and fonts. We need a Themes tab.

In the list, you'll see the current active theme (it'll be marked with the appropriate icon) and the default theme, often called "Classic," "Default," or "Untitled." Click on the preview of the standard theme. On the page that opens, you'll see the "Apply" or "Use" button. Once clicked, the system will automatically replace all the design elements with factory ones.

In some versions of MIUI, the process may be slightly different. If the application button is inactive, try to delete the problematic theme first. To do this, in your profile, click on the control icon (three dots or gear) next to the active theme name and select "Delete." After deleting, the system will automatically switch to standard design.

Reset via screen and system settings

If the Themes app doesn’t work properly or doesn’t start, you can try changing the display settings through the system settings menu, a method that is less effective for a complete change of style, but helps reset some parameters, such as font size or system colors.

Go to Settings → Screen. You can find items related to text size, interface element size, and theme (light/dark). Although you can't choose a specific theme from the directory here, resetting those settings to default values often helps eliminate visual bugs.

Also worth checking is the Wallpaper and Personalization section in the phone's main settings. The new MIUI versions have some of the functionality in there. If you have a Global Theme installed, you can switch it from this menu by selecting the Classic option.

Remember that changes to system settings may require a device reboot to take full effect. After performing all the manipulations, be sure to restart Redmi 9T by pressing the power button and selecting the appropriate menu item.

Use of engineering menu and debugging

For advanced users who are facing serious display problems, there is a debugging menu reset method that allows you to force the system process that controls the interface to restart. Be careful: wrong actions here can lead to unstable phone operation.

To start, you need to activate the developer mode. Go to Settings → About the phone and quickly press 7 times on the MIUI version. Once the message “You became a developer” appears, you can move to the next step.

The settings menu will have a new section, Advanced Settings → Developers. Find the USB Debugging and enable it. Next, we'll need to run the system settings app through ADB or a dedicated launcher, but there's an easier way through the hidden menu.

There is a command that allows you to reset the interface settings without completely resetting the data. Enter the code ##6484## to enter the engineering menu (CIT) into the dialer. Although there is no direct Reset Theme button there, checking the screen components can restart the graphics driver, which sometimes eliminates artifacts.

Cleaning the cache and application data Topics

Often the problem is not the topic itself, but the accumulated debris or corrupted temporary files of the theme app.Cache cleaning is a safe procedure that does not delete your personal photos or contacts, but resets the display settings.

Go to Settings → Applications → All Apps. In the list, find the Themes app (or Themes) and click on it to open the management page. Select Memory or Storage.

On the screen that opens, you'll see two main buttons: "Clear" and "Erase Data." First, use the "Clear Cache" button. If that doesn't work, click "Clear Data." The system will warn you that the settings will be reset -- confirm the action.

⚠️ Note: When you delete the Themes app data, all the designs you download will be deleted from your phone’s memory. Make sure that the topics that are important to you are saved in your Mi Account or copied.

Once the data is cleared, the Themes app will return to a store-like state, and when it first starts, it may require you to re-accept the user agreement and select a region, and then apply the standard theme from the list of available ones.

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Tip: Before clearing the Topics app data, take screenshots of important settings or file names of the ones you want to save so you can find them in the directory later.

Residual files removal and recovery

Even after disabling the theme, the system may still have tails — fonts, sounds and graphics files that take up space and may conflict with new settings. It is recommended to use the built-in Security tool for deep cleaning.

Open the Security app (green shield icon). Click on Clean up. The system will analyze the storage and suggest that you delete temporary files. You should also go to the Application Management section inside this tool and check if there are any suspended graphics-related processes.

If you have installed themes from third-party sources (not through the official store), check the MIUI/theme folder in the file manager. There may be files with the.mtz extension. Deleting them will free up space and prevent accidental activation of the old design.

If the interface is unstable even after all the procedures, you can reset the launcher settings. To do this, in the application settings, find System Launcher and clean its data. The desktop will rebuilt, the icons will stand in the standard order.

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Deep cache cleaning and deletion of residual.mtz files is a key step to completely remove traces of a third-party theme.

Frequently Asked Questions (FAQ)