Owners of budget smartphones like the Xiaomi Redmi 9A often face the desire to personalize the device interface. The default system font used in the MIUI shell may seem boring or not contrasting enough for comfortable reading. Fortunately, the Android architecture in conjunction with Xiaomi’s branded add-ons allows you to make changes to the appearance of text without obtaining superuser rights.
The process of changing the type of letters does not require deep technical knowledge, but has its own nuances, depending on the regional version of the firmware. Global versions of the software can differ from Chinese counterparts in the set of available options. In this article, we will discuss all legal and safe ways to install new fonts, and also touch on methods that may require deeper intervention in the system.
Standard font settings in MIUI
The easiest and safest way to change the visual style of text is to use the built-in tools of the system. In the MIUI shell installed on Redmi 9A, the Themes app is responsible for this, and this is where the official catalog of fonts tested by developers for compatibility and readability is stored.
To access the settings, you need to go to the Settings menu → Screen → System Font. However, in some versions of the firmware, this path can lead directly to the theme store. If you want to just increase the text size for better perception, use the slider in the Settings menu → Screen → Text size. This will not change the style, but will significantly affect the usability of the smartphone.
The built-in directory offers a limited selection of free options, most of which are variations of the standard Roboto font. Paid fonts often have a more expressive design, but buying them requires linking the payment method to your Mi Account. It is important to understand that standard settings do not allow you to download arbitrary font files from your phone’s memory without using additional tools.
Xiaomi regularly updates its font library, adding new styles optimized for screens with different resolutions. On the Redmi 9A model with its HD+ matrix, it is important to choose fonts with good readability to avoid the effect of "ladder" on the letters.
⚠️ Note: When installing fonts from third-party sources through the standard themes menu, make sure the source is reliable. An incorrect file can cause the system interface to become unreadable and you will have to boot in safe mode to recover.
Using the “Themes” application for customization
The main tool for changing the interface is the Themes app, which is pre-installed on all Redmi devices, and there is a separate category within the app dedicated exclusively to fonts, and you need to open the app, click on the profile icon, or find the Fonts tab in the bottom menu.
The directory is divided into sections: Popular, New, and Free. The Free filter is especially useful for users who do not want to spend money on virtual goods. Once you choose the style you like, just click the Download button and then Apply. The system automatically restarts the interface, and the changes will take effect instantly.
It is worth noting that some fonts may not support all Cyrillic characters or special characters. Before using it, it is recommended to review an example of text that is usually displayed in the preview. If the example contains "squares" instead of letters, then the font does not have full localization.
If a standard directory doesn't offer anything suitable, users often turn to third-party solutions, but even using third-party files, they can often be "cheated" and installed through the themes menu if the file is properly prepared, and we will talk about this in the next sections.
Installation of third-party fonts through MIUI
To install fonts that are not in the official store, you will need a file format.mtz. This format is proprietary-format Xiaomi. You can find such files on specialized forums or in Telegram channels dedicated to modification of MIUI. The installation process requires a certain sequence of actions.
First, you need to download the selected font file to the device memory. Then you need to open the Themes app, go to the Profile section (human icon) and select the Fonts item. This menu often has an Import button or the ability to select a file from memory if the system recognizes the format. If direct import does not work, the renaming method is used.
The method is to rename the downloaded font file so that its name matches the name of any free font from the official directory that is already uploaded to the device. After that, in the font management menu, you need to select this “replaced” file and apply it. The system will apply the style of the third-party file, thinking that it uses the standard one.
☑️ Checking before installing font
This method bypasses the limitations of regional firmware versions, where the font catalog can be cut down. For example, global versions of Redmi 9A often have fewer choices than Chinese builds. Using imports expands the options for customization.
Working with the zFont 3 application
One of the most popular third-party font tools on Android is the zFont 3 app, which automates the installation process and supports a huge number of formats, including.ttf and.otf. For owners of Redmi 9A, this application is a real salvation, as it can bypass many of the limitations of MIUI.
Once the application is installed, you need to give it the necessary permissions to access the file system. In the main menu of zFont 3, you can select a font from the built-in library or download your file. The application itself will suggest the installation method that is most suitable for your version of MIUI. This is usually installed through local themes or through the Fonts menu.
The process can look like this: the application will create a temporary theme file, then ask to apply it through the standard theme menu.It is important to follow the instructions on the screen carefully, as the steps may vary depending on the version of Android (on Redmi 9A it is Android 10 with MIUI 12 or later).
⚠️ Note: When using third-party font installer apps, you give them access to system files. Use only proven high-ranking programs on Google Play to avoid introducing malicious code.
The advantage of zFont 3 is that you can preview the font in screenshots of the interface, and you can see what the menus, messages and browser will look like before the changes actually apply, which saves time and eliminates the need to constantly switch fonts back and forth.
Compatibility table and file formats
Not all font formats work equally well on Xiaomi devices. Understanding the differences between them will help avoid mistakes when finding and installing new styles. Below is a comparative description of the main formats you may encounter.
| Format | Description | Compatibility with MIUI | Note |
|---|---|---|---|
| .mtz | Xiaomi's native theme format | 100% | Requires conversion from TTF to install |
| .ttf | Standard TrueType Font | Through zFont 3 | The most common format on the network |
| .otf | OpenType Font | Through zFont 3 | Supports more complex typography |
| .fnt | System font file | Low. | Used in older versions of Android |
As you can see from the table, the native format is.mtz. However, since most fonts on the Internet are distributed in.ttf or.otf formats, the use of converters (built into zFont or online services) becomes necessary.
When searching for fonts, note the phrase “Cyrillic support” or “Cyrillic support” in the description. The lack of this support will lead to the fact that the entire Russian text will turn into a set of incomprehensible characters, which will make using the phone impossible.
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If after installing the font, the application icons disappeared or the text became unreadable, load into safe mode (clamping the off button and selecting the appropriate item), delete the font theme and restart in normal mode.
Possible problems and solutions
In the process of customization, Redmi 9A users may face a number of typical problems, one of the most common being when the font has been used, but only changed in some applications, and the system menus have remained the same, due to the fact that some applications have their own built-in styles, which are more important than the system ones.
Another common problem is the font reset after a system update or reboot. This can occur if the font installed has been corrupted or incorrectly integrated into the system. In such cases, resetting or resetting the font settings to the standard ones through the Settings menu → Screen → System Font → Restore helps.
Sometimes users complain about the performance of the interface after installing “heavy” graphic fonts. Although Redmi 9A has enough power for basic tasks, complex rendering of characters can create microlatency, in which case it is worth choosing a simpler, vector font.