Xiaomi Redmi 9A smartphones are deservedly popular due to their affordable price and reliable work, but owners of budget IPS-matrixes often face the need to fine-tune the display. Standard factory settings do not always take into account the individual preferences of the user or the characteristics of human vision, which can make the image appear too cold, warm or not bright enough. In addition, over time, it may require checking and calibrating the sensor if the response to touch has become incorrect or “dead zones” have appeared.
The process of adjusting the image parameters to the reference values includes both the software setting of color reproduction through hidden menus and the physical sensitivity check of the touchscreen. It is important to understand that screen calibration in the context of mobile devices usually means setting the color profile and gamma, as well as eliminating problems with the responsiveness of the touch layer. For Redmi 9A, running on the basis of the MIUI shell, there are specific methods for accessing advanced settings that are not visible in the standard menu.
In this article, we will take a look at all the ways you can optimize your device’s visual quality and haptic response, learn how to use the engineering menu to deep tune, which third-party apps are really useful and which are just simulations, and how to properly diagnose the matrix. Properly configured not only improves visual perception of the content, but can also extend battery life by reducing brightness without loss of readability.
Diagnostics of the current state of the Redmi 9A matrix
Before you start taking active action to change the parameters, you need to objectively assess the current state of the display of your Xiaomi Redmi. 9A. Budgetary IPS-The panels often have uneven lighting or incorrect viewing angles, which can be partially compensated by software, but first you need to identify specific defects. Visual inspection in bright light and with the screen off will help determine the presence of broken pixels or lights at the edges.
For a detailed check, it is recommended to use specialized test images that display gradients and primary colors, which allows you to see the "stepping" of gradients (banding) or color distortions that are not noticeable when you use the interface normally. If you find that white goes into yellowness or blue appears faded, this is a direct indication for color calibration.
- 🔍 Include white at maximum brightness to find broken pixels or spots.
- 🌈 Check the gradient mapping for sharp transitions between shades of gray.
- 👁️ Evaluate viewing angles: do colors change when tilting the smartphone at an angle of 45 degrees.
- 🖐️ Swipe your finger across the screen to check the uniformity of the sensor response.
⚠️ Note: If you have detected physical defects in the matrix during your diagnosis, such as black spots, cracks or completely broken areas of the touch screen, software calibration will not help.
Special attention should be paid to checking the sensor, because it is the incorrect operation of the sensor that is often perceived by users as a screen problem. The Redmi 9A uses a capacitive multi-touch, which can lose sensitivity when using poor-quality protective glasses or with static electricity. Accurate diagnosis at this stage will save time and allow you to understand what type of calibration you need.
Using CIT's engineering menu to check touchscreen
The MIUI shell on the Xiaomi Redmi 9A has a built-in diagnostic tool called CIT (Customer Integration Test), which is designed to factory-check all components of the device and contains the most accurate tools for checking and initial calibrating the touch screen, accessed through a special code in the Phone application, which does not require obtaining superuser rights (Root).
To get into the testing menu, open the standard caller and type the combination ##6484##. If the code is entered correctly, a list of dozens of tests will open. You need to find a item associated with Touchpanel or Single Touch Test. In this mode, the screen becomes sensitive to any touch, displaying coordinates and pressing force, which allows you to identify areas where the sensor is “glutting” or not responding at all.
☑️ Sensor check in CIT
In the touchscreen mode on the Redmi 9A, a grid or simply a black background is usually displayed, which changes color when touched. Swipe your finger over the entire surface, including the very edges of the matrix. The line should not be interrupted, and touch points should appear instantly. If in certain areas the line breaks, this can indicate a need for hardware repair or, at best, a software failure that can be corrected with a complete reset.
⚠️ Warning: Do not press Fail or Start randomly in the engineering menu.Some tests may change the basic operating parameters of the equipment, and it may be necessary to reset to factory settings to return to the original values.
While the CIT menu is primarily used for diagnostics, it also allows you to know if the device needs calibration. If the test shows the sensor is stable throughout the area, but the cursor or finger still floats away, the problem may be in the software layer or the security glass, and if all tests are successful, you can move to fine-tuning the color and sensitivity through the system settings.
Color rendering and image parameters
The main visual change tool on Xiaomi Redmi 9A is in the standard settings menu. Here the user can change the color profile, color temperature and reading modes, which significantly affects eye fatigue and the quality of the displayed content. Go to Settings → Screen → Color scheme to see the available options.
By default, the device can choose either Saturated or Standard. For the most accurate color reproduction, close to the sRGB standard, it is recommended to choose Classic or Standard. In Saturated mode, colors look brighter and more flashy, which is not popular, but can distort the real shades of photos. Classic mode makes the colors more natural and calm.
| Parameter | Description of the impact | Recommended value |
|---|---|---|
| Color scheme | Determines the overall tone of the display (warm/cold) | Classical. |
| Color temperature | Shifting white balance towards blue or yellow | By default or slightly warm |
| Reading mode | On (automatically) | |
| Dark Mode | Inverts interface colors for dark time | At the discretion of the user |
Also important is the color temperature. The screen settings menu often has a slider that allows you to shift the white balance. If the screen seems too blue ("cold"), move the slider towards warm shades. Not only is it more pleasing to the eyes, but it can also visually improve the quality of the black dot on the eye. IPS-redmi matrix 9A, deepened.
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For nighttime reading, turn on Read Mode in your screen settings, which adds a yellow filter to reduce blue light, which helps you fall asleep faster and reduces your visual strain.
Application of third-party calibration applications
If standard MIUI tools aren’t enough, Google Play Store apps come to the rescue to get deeper into the display settings. However, an important technical nuance is that without Root rights, most of these apps can’t physically change the matrix settings, but only superimpose a color filter over the image. For Xiaomi Redmi 9A, this means that you can adjust the colors programmatically, but it can slightly reduce the performance of the interface.
One of the most popular and functional tools is the Screen Balance or Blue Light Filter app, which allows you to independently adjust the intensity of the red, green and blue channels, which allows you to pull out colors on a budget matrix, making them more pleasing to the eye, for example, if the screen goes green, you can reduce the intensity of the green channel.
- 📱 Screen Balance: Allows you to fine-tune white balance and save profiles for different apps.
- 🌙 Twilight: Automatically adjusts color temperature depending on the time of day.
- 🎨 Display Tester: Helps identify defects and offers recommendations for setting up.
- 🔧 Touch Screen Repair: Trying to "revive" sensor non-working areas (efficiency controversial).
When installing these apps, pay attention to the permissions requested. Filters often require permission to “mask over other windows.” Once you have set up color profiles in the app, the result is saved until the device is rebooted or the service is turned off in Android settings. This is a convenient way to personalize Redmi 9A without complex reprogramming.
Resetting settings and updating firmware
Sometimes, problems with screen calibration and sensor malfunction on Xiaomi Redmi 9A are caused by software failures in the operating system. Accumulated cache, errors in updates or application conflicts can lead to the screen becoming “glutty” and colors become faded. In such cases, the most effective solution is to reset or update the software to the current version.
Before taking radical steps, check for system updates. Go to Settings → About Phone → MIUI Version. If a new update is available, install it. Xiaomi developers regularly release patches that fix the errors of display and touchscreen drivers. If the problem appeared after the last update, you may need to roll back on the previous version or wait for a new patch.
⚠️ Warning: Before performing a full Hard Reset, be sure to back up all important files, contacts, and photos. The reset process will remove all user information from the internal drive without the ability to restore it.
If the updates don't work, you can try resetting all the settings to factory settings, which will return all the screen settings, including hidden calibrations, to their original state. Often this solves problems with the "floating" sensor or incorrect brightness. Once reset, the device will work as it did on the first day of purchase, which eliminates the impact of user configuration errors.