Owners of budget smartphones often face the need to personalize the interface of the device to make it more convenient and familiar. Xiaomi Redmi 9A model, running on the shell of MIUI, offers a wide range of options for changing the appearance, but some functions are hidden from the eyes of the average user. The question of changing the design of the response button to an incoming call is one of the most popular among those who want to refresh the interface of their gadget without obtaining superuser rights.
The standard call interface may seem boring or not contrasting enough, especially for people with low vision. In this article, we will discuss in detail all the available ways to change the appearance of the slider or call button, you will learn how to use the built-in system tools, third-party applications and special topics to achieve the desired result.
It should be noted that there is no direct “button color” setting in the standard phone settings menu. The call interface is rigidly tied to the chosen design theme or system display parameters, so the process of changing will be to comprehensively adjust the visual style of the device, not replace one specific element.
Standard settings of the call interface
Before you start installing third-party solutions, you need to explore the opportunities that the Android operating system itself and the MIUI shell provide. Basic settings allow you to change some display parameters, although they do not give you complete freedom of action. First of all, you should pay attention to the availability and font size parameters, which can indirectly affect the perception of call control buttons.
To access the basic settings, you need to go to the Settings menu and select the Screen section, which allows you to adjust the font size and image scale, which sometimes helps if the response button is too small or merges with the background, and also in the Sound and Vibration section, you can select the vibration settings when you touch, which improves the tactile response when you answer a call.
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Use a dark theme in your screen settings to reduce eye strain and change the contrast of call buttons at night.
It is important to understand that standard tools are limited by Android's security policy. PNG-Images of system buttons without special themes, but updates to Google components and the shell itself MIUI Check for updates in the About Phone section to make sure you have an up-to-date version of the software with the latest interface features.
Using the Themes app to change style
The most effective and safe way to change the appearance of the response button is to use the built-in Themes app. Xiaomi theme store contains thousands of designs that completely replace the system icons, including elements of the call screen. This method does not require root rights and guarantees stable operation of the device.
To get started, run the Themes app on the home screen or in the Tools folder. In the search bar, type in queries like Call UI, Dialer, or Answer to a Call. In the search results, you will see previews of those that often show exactly what the incoming call screen will look like. Choose your favorite option and click Download.
☑️ The theme setting algorithm
After you download the theme, click Apply. The system will warn you that the wallpaper, lock screen and call style will be changed. Confirm the action. Now, when you call in, you will see a new design of the answer button. If you do not like the result, you can always go back to the standard theme "Classic" or "No restrictions" in the user profile.
⚠️ Note: Some topics may be paid or advertised. Carefully check author ratings and comments before installation to avoid bugs in the interface.
Set up a full-screen response to a call
One of the reasons users want to change the answer button is the inconvenience of a small slider or call window. On the Xiaomi Redmi 9A, you can activate the full-screen response mode, which makes the call acceptance button more noticeable and large, which is especially true for this model, given its budget segment and screen resolution.
To activate this feature, go to the Phone (green handset) app. Click on the three dots in the upper right corner or the menu button, then select Settings. Find the Incoming Calls section. There'll be a Full Screen Response switch available. By activating it, you'll change the behavior of the call window.
| Parameter | Standard regimen | Full screen mode |
|---|---|---|
| Window size | Compact pop-up window | Full screen. |
| Answer button | A little slider or button | Big button on the bottom. |
| von | Blurred image of contact | Photo of contact or black background |
| Convenience | For a quick viewing | For a guaranteed response |
Changing this setting dramatically changes the phone experience: a large button minimizes the risk of miss, which often happens in a hurry, and in full-screen mode, more information about the caller is often displayed if the data is stored in contacts.
Application of third-party launchers and applications
If the built-in MIUI doesn't satisfy you, apps from the Google Play Store come to the rescue, and there are specialized programs that completely replace the standard caller and incoming call interface, called Call Screen or Dialer.
One popular solution is the Truecaller app or specialized launchers like NIAGARA or Microsoft Launcher, although the latter change the overall look of the system. To replace the call screen, you should look for applications on the request "Incoming Call Screen", after installing such an application, you will need to give it a number of permissions: access to contacts, phone and display on top of other windows.
The setup process usually goes like this: Once installed, the app will ask you to install it as the default call handler. This is a critical step. Without this, Android will ignore the new interface and show the standard Xiaomi screen. In the phone settings (Applications → Application Management → Three Dots → Default Apps), select the installed program.
Risks of using third-party calls
Consider that on the MIUI shell, an aggressive energy saving system can kill the process of a third-party application, which causes you to see a black screen or standard interface instead of a custom one when calling. To avoid this, you need to lock the application in memory by opening a list of running processes and pressing the lock, or in the battery settings, set "No restrictions" for this application.
The Impact of System Fonts and Element Size
The visual perception of the response button is directly dependent on the system fonts and the overall scale of the interface. MIUI has hidden and explicit settings that allow you to increase the size of all elements, including the call control buttons. This does not change the picture of the button, but makes it much larger and more visible.
Go to Settings → Screen → Text and font size. With a slider, you can zoom in the font to maximum value. This action automatically enlarges the interface elements in adaptive applications, including the standard call. Also, in advanced settings (Advanced Settings → Element Size), you can choose large or large size, which is relevant for people with poor vision.
Another method is to install system fonts through the Topic app, where you can upload bold or enlarged fonts under the Fonts section. Fat often makes the buttons (like "Respond" or "Discard") more readable, which visually changes the perception of the control.
⚠️ Note: Installation of fonts from unknown sources or modified system files may result in incorrect text display in other applications or "bootloop" (cyclic reboot.
Resetting calls and eliminating errors
Sometimes the desire to change the answer button is not due to aesthetics, but to a technical problem: the button may not be pressed, disappear or display incorrectly, in which case resetting the phone and contact settings to the factory state helps, which will not delete your contacts, but will return the interface settings to the original one.
To perform the reset, go to Settings → Applications → Application Management. Find the Phone app (green handset icon, system). Click on it, select Memory and then Clear → All data. Repeat the same steps for the Contacts and Google Play Services app.
Sequence of actions for discharge:
1. Settings
Annexes 2.
3. Application management
Telephone (System)
5.Memory
6. Clear → All dataOnce reset, the phone may run a little slower in the first minutes while the system re-indexes contacts. Check what the call screen looks like now, often solving problems with sticking the interface or displaying elements incorrectly after the system update.
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Phone reset is a secure procedure that does not delete your call history and contacts if they are synchronized with your Google or Mi Cloud account, but returns your interface settings to factory settings.