How to Calibrate the Screen on Xiaomi Redmi Note 4

Xiaomi Redmi Note 4 smartphones, especially those with MediaTek processor, have earned legendary status because of their balance between performance and cost. However, users often face one common problem: incorrect color reproduction or too low maximum brightness of the display immediately after purchase. This is not a production defect in most cases, but rather a consequence of software restrictions or factory settings that can be adjusted.

Screen calibration is a process of adjusting color balance, gamut and brightness to achieve the most natural image. Owners of the Redmi Note 4 are more fortunate than users of many other brands, as MIUI engineers have left access to hidden engineering menus where you can change the display settings without obtaining superuser rights (Root).

Before you take action, you need to understand that you will interfere with system parameters. Although the risk of damage to the device is minimal, if you follow the instructions clearly, the responsibility for changes lies with the user. In this article, we will discuss safe methods for adjusting color temperature, saturation and contrast, and also touch on the topic of hardware calibration for advanced users.

Preparation of the device for calibration

The first step before making any changes to the display settings is to clean the workspace and prepare the lighting conditions. Calibrate the screen with the maximum light on in a dark room or, conversely, with dim light in bright sun is useless. Your eyes adapt to the external conditions, and you will not be able to objectively assess the result. The best option is daytime lighting of medium intensity or artificial light.

It is also important to make sure that the display does not have antispy film or heavily toned glass that can distort colors. If you use such accessories, they should be temporarily removed, and before starting the procedure, it is recommended to reset all image settings to factory values if you have previously tried to change something.

⚠️ Warning: Before you start any manipulation of system settings, be sure to back up important data. Although screen calibration rarely causes system failures, unforeseen circumstances may require you to roll back changes.

Make sure your Redmi Note 4 has a battery charge of at least 50%, and working with the engineering menu and constantly changing color profiles can consume energy, and suddenly turning off the device during the setup process can lead to resetting parameters or, in rare cases, software errors.

Use of the built-in MIUI settings

The safest and easiest way to improve the image is to use the regular MIUI shell tools. In Xiaomi smartphones, this functionality is quite advanced and allows you to change the basic parameters without entering the hidden menus. To access them, you need to go to Settings → Screen. Here you will find the main adjustment sliders.

First of all, look at the "Color Scheme" or "Color Temperature." Depending on the firmware version, the interface may vary. Standard, saturated and User modes are usually available. The best way to calibrate accurately is to choose User Mode, as it gives you access to advanced settings.

In user mode, you'll have sliders that adjust the shades, and by moving them, you can shift the white balance to warm (yellow) or cold (blue) colors. Many users prefer to slightly "warm" the screen, because this reduces the strain on the eyes during long reading. However, for professional work with photos or videos, it is better to aim for neutral values.

• 🎨 Saturation: regulates the intensity of colors, making them brighter or faded.
• 🌡️ Temperature: Shifts the overall white balance from blue to yellow spectrum.
• 👁️ Reading Mode: Automatically switches the screen to monochrome or yellowish mode to protect vision.

And remember, Auto Brightness, which is very energy-saving, but you better turn it off when you calibrate it, and you'll be prevented from seeing the color in an objective way by the constant surges in the backlight, and you'll be able to record 60-70% brightness for basic settings.

Engineering menus and hidden codes

For a deeper setup owners Xiaomi Redmi Note 4 is available to log into the engineering menu through special USSD-It's a powerful tool that allows you to adjust the parameters at the level of the display drivers. Be careful: changing unknown parameters in this menu can lead to unstable operation of the device.

To get to the menu, open the Phone app and dial the code ##6484##. If the code doesn't work, your firmware version may block this access, and then you will need to install a special engineering menu calculator application from the Google Play store. In the test list that opens, select the item associated with the display (usually called Display or Screen).

Inside this section, you can find broken pixel tests, touch screen checks, and most importantly, color gamut settings. Here you can often find options for changing gamma curves or color inversions that are hidden in the regular menu. A key feature of the Redmi Note 4 is the ability to change the backlight voltage through the engineering menu, which allows you to make the screen brighter or, conversely, dimmer to save charge.

Use these settings with caution. Write down the initial values of each parameter before changing, so that if you fail, you can go back. The engineering menu is not a toy, it's a professional diagnostic tool.

Configure with Engineer Mode MTK

Since Redmi Note 4 comes in two versions (Snapdragon and MediaTek), owners of the MediaTek (Note 4X) version have additional features available through the Engineer Mode MTK app. It can be downloaded from official sources or trusted repositories.

Once you install and run the app, go to Telephony → CDS Information → Radio Power or directly to the display section (often labeled LCM or Display) and you can find parameters related to backlight brightness, changing the values to get a deeper black color or, conversely, squeeze the maximum out of the matrix.

However, changing the parameters in this section requires understanding how gamma correction works. Incorrect values can lead to "broken" zones on the screen or uneven backlighting. It is recommended to change the values in steps of no more than 5-10 units and immediately check the result.

Remember that after making changes to the MTK engineering menu, you need to restart the device so that the settings are applied correctly. Sometimes the system may roll back changes when you update the firmware, so save screenshots of your settings.

Third-party calibration applications

If built-in tools and engineering menus aren’t enough, third-party apps from the Google Play store come to the rescue, with utilities like Screen Balance or Color Calibrator leading the way, working by layering a filter layer over the image to fine-tune the balance of red, green and blue channels.

The main advantage of these applications is the ability to create multiple profiles, such as one profile for reading documents (warm, low brightness), another for watching videos (saturated, cold), and a third for games, you can switch between them through a widget on the desktop or hotkeys.

However, this method has a significant drawback: such applications consume additional battery and processor life, since they must constantly render the layer on top of all windows. On older devices, this can lead to micro-interface delays or a decrease in autonomy by 5-10%.

• 📱 Screen Balance: allows you to adjust the brightness of each color channel separately.
• 🎨 Color Calibrator: Offers presets for different use cases.
• 🌙 Night Shift (built-in): an analog built into Android that works more efficiently than third-party counterparts.

⚠️ Note: Screen calibration applications require permission "Overlaying on top of other windows." Make sure you trust the developer, as this resolution can theoretically be used to intercept data (although this is rare in popular applications).

For Redmi Note 4, the use of such applications is justified only if the regular MIUI facilities do not give the desired result. In most cases, the built-in functionality is enough for comfortable use.

Hardware calibration and display replacement

Sometimes software methods are powerless, and the problem lies in the physical wear of the matrix or the low quality of the installed screen. If your Redmi Note 4 has been repaired, chances are that there was a cheap copy of the display with poor viewing angles and unnatural color reproduction.

You can check the quality of the matrix with special test images (gradients, fields). If you see noticeable lights on the edges of the "cloud" when displaying black or a rainbow grid when pressed with a finger, software calibration will not help, in which case the only solution is to replace the display module with an original or qualitative analogue (for example, from proven brands like BOE or Tianma).

And it's also worth mentioning the degradation of the backlight, because over time, the backlight LEDs will dim and can change the shade of the glow. If the screen turns uneven or there are dark spots, it's a sign of aging hardware components. It's software-impossible to fix this.

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When buying a new display for Redmi Note 4, pay attention to the type of matrix. IPS-screens provide better viewing angles and color reproduction compared to cheap ones TN-similar, which are often put in service centers to save money.

If you decide to replace, be sure to calibrate the new screen immediately after installation. New matrices often have a factory skewed blue side, which is easily adjusted through the Settings → Screen menu.

Frequently Asked Questions (FAQ)

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Optimal screen calibration is a balance between eye comfort and color accuracy, achieved through MIUI customizations without the need to climb into the engineering menu.