Modern Xiaomi and Redmi smartphones feature high-quality arrays that are often superior to many of their competitors in color reproduction. However, even the most advanced displays can lose color accuracy over time or respond to touch less responsively, which can be due to software failures of the MIUI or HyperOS shell, as well as physical wear and tear of components. Understanding how the display system works is necessary for comfortable use of the device.
Screen calibration is the process of adjusting the color profile and sensitivity of the touchscreen to reference values. Users often confuse the need for calibration with conventional surface contamination or low-quality protective glass. Before embarking on complex settings, it is worth making sure that the problem is in the software part or the degradation of the matrix. In this article, we will discuss in detail all available methods of settings.
The display may be incorrect, with whites going yellow or blue, and uneven brightness. Sometimes the touchscreen starts to glitches by skipping touches or phantom taps. There are several proven ways to fix these situations, from built-in engineering menus to specialized applications. It's important to approach the process carefully so as not to disrupt the system.
Diagnostics of problems with the display and touch screen
The first step is always to make a thorough diagnosis. Don't rush to reset until you know what's wrong. Xiaomi smartphones have a hidden engineering menu that allows you to test all the hardware components, access it through a standard dialing interface. Enter the code ##6484## or ##4636### to call the CIT menu.
The list that opens will look for items related to display and input, usually called Display, Touchpanel, or Color. Color testing will see if there are broken pixels or uneven lighting around the edges of the screen. Touchscreen test will show if all touch points are correctly recorded. If you see obvious defects in this menu that do not disappear after rebooting, the problem may be hardware.
⚠️ Warning: If the screen goes out, flashes or artifacts appear during testing in the engineering menu, stop the test immediately.This may indicate a serious malfunction of the plume or display controller requiring repair at the service center.
Software failures are often disguised as hardware, for example, the miui-home process freezes can create the illusion of a broken touchscreen, so before deep calibration, it is recommended to perform a forced reboot by holding the power button for 10-15 seconds, which will clear RAM and restart all system services responsible for input and output of the image.
Use of the Engineering Menu to Reset Calibration
One of the most effective ways to get the display back to factory settings is to reset it through an engineering menu, which requires no third-party software and works at the firmware level, but it's worth remembering that interfering with system settings requires care. Any wrong action can cause the color profile to change to incorrect.
To reset, you need to use the code ##6484## again. In the CIT menu, find the section associated with the display. Depending on the version of MIUI, the path may differ. Look for options like "Backlight", "LCD" or "Touch." These menus often have a "Pass" or "Fail" button inside, but the reset sometimes requires you to click a combination of buttons or select a special menu item if it is available in your version of the software.
If you have a "Restore Default" or "Reset Calibration" option on your menu, use it safely. This action will return the Lookup table (LUT) to the values set by the manufacturer in the factory. After that, the device may need to reboot. Don't ignore this requirement, as the new parameters are applied only after the full cycle of the system.
What do I do if the codes don't work?
Importantly, newer versions of HyperOS may have limited access to some CIT features, for security and stability reasons. If standard codes don't work, try entering ##3646633##, although this code is more common in MediaTek chip devices, while Xiaomi is more likely to use Snapdragon.
Color profile settings through standard settings
For most users, a deep dive into the engineering menus is not required. Xiaomi's shell offers flexible enough tools to customize the image in the standard settings menu. To get there, go to Settings → Screen → Color Scheme. Here you will find the main presets designed for different types of content.
The system typically offers multiple modes: "Saturated," "Standard," "Classic," and "P3." The "Saturated" mode twists colors to the maximum, which is pleasing to the eye but distorts reality. The "Standard" or "P3" mode tends to the sRGB or DCI-P3 color gamut, which is critical for photographers and designers. Choosing the right mode is already half the calibration.
Some models, especially the flagship Xiaomi and Redmi Note series, have advanced calibration available, which allows you to manually move color temperature sliders (heat to cold) and adjust color tone, which allows you to compensate for the individual perception of color or the characteristics of a particular matrix of your specimen.
☑️ Color rendering adjustment
And remember, Read Mode or Vision Protection, which adds a warm filter to remove the blue spectrum, and while it's good for the eyes at night, it has to be turned off to calibrate colors, because it artificially distorts colors, making calibration meaningless.
Application of third-party applications for accurate configuration
When built-in tools are not enough, Google Play apps come to the rescue, with Display Tester or Screen Test being the leader in this field, which allows you to make detailed diagnostics and, in some cases, suggest corrective profiles, but without root rights, they can only show the problem, but not fix it at the system level.
There are many opportunities for owners of Root devices, applications like Kernel Adiutor or specific Magisk modules that allow you to edit display configuration files directly, and this gives you control over gamma curves and white balance that you can't normally use, but using these tools requires a lot of skill.
A popular method is also to use calibration profiles created by model-specific enthusiasts, which can often be found on specialized forums such as 4PDA or XDA Developers, and can dramatically change the way a screen is viewed, making it look like a reference monitor.
| Annex | Need a Root. | Substantive function | Difficulty |
|---|---|---|---|
| Display Tester | No. | Diagnosis and tests | Low. |
| Screen Balance | Yes. | Change in the RGB balance | Medium |
| Kernel Adiutor | Yes. | Control of the kernel and screen | Tall. |
| Testy - Screen Test | No. | Checking broken pixels | Low. |
When using third-party software, always check the permissions the app requests. The calibrator doesn't need access to your contacts or microphone. Avoid dubious programs that promise "screen speed" or "super color," as they often contain ads or malicious code.
Calibration via ADB and computer
For advanced users who do not want root rights, but need deep customization, there is a method of using a debugging bridge. ADB (Android Debug Bridge. This is a way to send commands to the system directly from the computer. USB» menu "For developers».
By connecting your smartphone to your PC, you can use commands to change the display settings. For example, the command to change the pixel density (DPI) looks like wm density, although this affects the interface scaling rather than color.
adb shell settings put system screen_brightness_mode 1
adb shell dumpsys displayThe first command, in the example, translates brightness control into manual mode (if supported), and the second one outputs detailed information about the current state of the display. Analyzing the output of the dumpsys display, you can see the current gamma and color space values. Changing these values requires knowledge of hexadecimal codes for your particular matrix.
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Before making any changes through ADB, back up important data. A team error can cause the screen to become unreadable and require a Recovery reset to return the settings.
This method is especially useful if the standard menu is blocked by the manufacturer or operator, but it requires caution: an incorrect parameter can put the GUI down, and you will have to restore the system through firmware.
Hardware factors and the influence of protective glasses
Often users are looking for ways to program calibrate when the problem is physical exposure to the screen. Cheap, low-quality oleophobic glass can create a rainbow effect or reduce brightness by up to 30%, and it can degrade the touchscreen sensitivity, making the screen feel “dull.”
Another factor is the age of the device. OLED-The arrays used in Xiaomi flagships are subject to burnout. Over time, organic LEDs lose brightness unevenly. Software calibration here is powerless: it can try to align colors, but it will not return the burned pixels their original brightness. In such cases, only a replacement module helps.
Temperature also plays a role. When the processor or battery is heated, the system can automatically reduce the brightness of the screen (trottling the display) to save energy and protect components. This is not a malfunction, but a normal mode of operation. If the screen becomes dim during play, let the device cool down.
⚠️ Warning: Don't use "folk methods" like color tapes or magnets to calibrate, and this will not only not help, but can damage the matrix or digitizer permanently.
If you've replaced the screen with a non-original one, calibration may not be possible at all. Copies of the displays often have different color profiles and do not support factory calibration data, in which case the only solution is to accept the features of the copy or find a better counterpart.
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Software calibration is only effective when the hardware is in good working order, and if the sensor is burned out or the touchscreen is physically damaged, no settings will return the perfect picture.