Xiaomi Redmi 4X screen calibration: a complete guide to adjusting colors and sensor

Xiaomi Redmi 4X is one of the most popular budget smartphones of 2017, and is still in use today for its reliability and ability to upgrade to modern firmware versions. However, over time, many owners face the problem of distorted colors, incorrect touch screen performance or uncomfortable brightness, in most cases, these problems are solved by screen calibration, a procedure that allows you to return factory display settings or adapt them to your individual preferences.

In this article, we will detail how to calibrate the screen on Redmi 4X (codename santoni), including color profile adjustment, brightness correction and automatic backlighting, and diagnostics and calibration of the touch layer. We will focus on hidden MIUI features that are not always obvious to users, and we will explain how to avoid typical errors when manually setting up. If your screen becomes dull, colors have lost saturation or the sensor does not respond well to touch, this will help restore the device to its former comfort of use.

Why do you need to calibrate the screen on Redmi 4X?

A smartphone screen is not only a matrix, but also a complex system of several layers: LCD panel (or AMOLED in other models), backlight, color filters and a touch module. Over time or after firmware updates, these components can start to work out of synchrony, which leads to:

• 🎨 Color distortions are too warm or cold shades, greenish or reddish shades of white.
• 🔦 Incorrect brightness – the screen is too dim even at maximum or, conversely, blinds in the dark.
• ✋ Sensor problems: touch skipping, false positives, floating presses.
• 🔄 Automatic backlighting that does not adapt to lighting or works in jerks.

Calibration helps you bring back the factory settings or adjust them to your needs, for example, if you use a smartphone to read, you can make the screen warmer and less bright to reduce the strain on your eyes, and for games or watching videos, you can increase the saturation and contrast. On Redmi 4X with its IPS- 5.0 HD [720×1280 matrix, proper calibration can greatly improve the experience of content, especially if the device has not been configured before.

⚠️ Warning: If color distortions occur after a smartphone drop or moisture hits, software calibration won't help - you need to diagnose a matrix or plume at a service center. Trying to "fix" hardware damage through settings can exacerbate the problem.

Calibration Preparation: What to Do in Advance

Before you start setting up the screen, follow a few preparatory steps:

1. Update the firmware. Outdated versions of MIUI may not support some calibration features. Check the software's relevance in Settings → About Phone → System Update.
2. Charge the battery. If the charge is below 30%, it is better to connect the device to the network - some operations (for example, resetting the screen settings) require stable power supply.
3. Make sure there are no protective glass or film, which can distort colors and interfere with the precise calibration of the sensor.
4. Back up the settings. If you plan to reset the screen to factory settings, save the current settings (you can take a picture of the settings menu).

It is also recommended to check if the smartphone has third-party themes or launchers that can override the system settings of the display.

1. Go to Settings → Themes.
2. Choose the standard MIUI Default theme.
3. Return to Settings → Home screen and install a standard launcher.

Calibration of screen colors: step-by-step instructions

There are several ways to customize color rendering on Redmi 4X: through standard MIUI settings and through the engineering menu. Let's look at both.

Method 1: Standard MIUI settings

This method is suitable for basic color correction without going into technical parameters:

1. Open the Settings → Screen.
2. Select Color Mode (in some versions of MIUI it may be called Color Temperature or Color Setting).
3. You will be offered three preliminary profiles: 🌞 Standard - balance between cold and warm tones. 🔥 Warm - reduces the blue spectrum, is suitable for reading in the evening. ❄️ Cold - increases the blue hue, can be useful for working with graphics.

Additionally.

Manual adjustment

Third-party apps like Screen Balance or Color Calibration can be used to fine-tune the settings, but they require ADB or root access rights, which is not always secure.

Method 2: Engineering menu (for experienced users)

If standard settings are not enough, you can use the hidden engineering menu, and be careful: incorrect changes to this menu can lead to unstable screen operation or even failure of the matrix.

1. Open the Phone app and type the combination: ##6484## (some firmware may run ##36446337##).
2. You will be taken to the MI Test Mode menu. Select Display (or Screen).
3. You can use broken pixels, gradients and color profiles here, and you can choose Color Test or White Balance to calibrate.
4. Follow the instructions on the screen to adjust your red, green and blue (RGB) levels. Write down your baseline values so you can get them back!

⚠️ Warning: Do not change parameters in the engineering menu that you do not know the purpose of. For example, TP Color or Gamma Correction can cause irreversible changes if you set incorrect values.

Check the MIUI version (must be at least 9.0)

Remove the protective film/glass

Choose a standard MIUI theme

Record the current color settings (photograph)

Charge the battery to 50% or more-->

Brightness and automatic lighting setting

Automatic brightness is a common problem on the Redmi 4X, especially after upgrades. The screen can spontaneously dim or become too bright under inappropriate conditions.

Manual brightness setting

1. Go to Settings → Screen → Brightness.
2. Turn off the automatic adjustment slider.
3. Manually set a comfortable brightness level (40-60% is recommended for home use).
4. Check how the screen looks in different lights, and if you can't see it in sunny weather, increase the brightness to 80-100%.

Calibration of the illumination sensor

If the automatic brightness is unstable, the problem may be the light sensor, so you can recalibrate it.

1. Turn on Automatic Brightness Adjustment in the screen settings.
2. Close the light sensor (located next to the front camera) with your finger for 5-10 seconds, then remove your hand.
3. Repeat the action 2-3 times – the system should “learn” new values.
4. If that doesn't work, reset the sensor settings via the engineering menu: Enter ##6484##. Select Light Sensor. Press Calibration and follow the instructions.

💡

If the brightness still behaves strange after calibration, try turning off the Read in the Dark function in Settings → Screen. It may conflict with automatic backlighting.

Touch screen calibration

Sensor problems on the Redmi 4X are often due to incorrect calibration of the layer responsible for touch recognition.

• 👆 Passing presses (must be touched several times).
• 🎯 False positives (screen responds without touching).
• 🔄 Swimming the pressing point (finger in one place and reaction in another).

For sensor calibration:

1. Enter the engineering code: ##6484##.
2. Select the Touch Screen Test (or TP Test).
3. Follow the instructions on the screen: you usually need to touch the crosses several times in different corners of the display.
4. After the test is completed, press Calibration or Save.
5. Reset the device.

If the calibration didn’t help, check:

• 🧴 Screen cleanliness (greaty spots or dirt may interfere with the sensor).
• 🛠️ Integrity of protective glass (cracks or bubbles distort touch).
• 🔧 Physical damage (the sensor plume may be removed after falls).

Resetting screen settings to factory

If all calibration attempts fail, you can return the factory settings to the screen, which will help if problems arise after installing third-party apps or unsuccessful experiments with the engineering menu.

For discharge:

1. Go to Settings → System and device → Additional → Resetting.
2. Select Reset Screen Settings (or Reset all settings, but this will delete other personal data as well).
3. Confirm the action and wait for the reboot.

⚠️ Warning: Full Hard Reset will remove all data from the device, including photos and apps. Before this procedure, be sure to back up through Settings → System and Device → Backup.

After discharge:

• 🔄 Recalibrate the light sensor and the light sensor again.
• 🎨 Select a color profile manually (automatic may not be appropriate).
• 🔋 Check the screen performance in different brightness modes.

Additional tips for improving the display

In addition to calibration, you can improve the experience of the Redmi 4X screen with additional settings and applications:

• 🌙 Night mode. Enable it in Settings → Screen → Night mode or use the Twilight app for more flexible settings.
• 📱 Read Mode. In Settings → Screen, turn on Read Mode, which reduces blue light and makes text clearer.
• 🔍 Screen scaling. If the fonts are too small, zoom in to Settings → Screen → Text size.
• 🎮 Game Mode. It’s helpful for gamers to enable Game Mode in Settings → Special Features – it blocks notifications and optimizes performance.

You should also pay attention to the animation and transition settings, which can be accelerated or turned off completely:

1. Activate Developer Mode (7 times click on the MIUI version in Settings → About Phone).
2. Go to Settings → Additional → For developers.
3. Find the points Windows animation, transition animation and Animator Duration - set the value Disconnected or 0.5x.

💡

If the screen is still not working properly after all the manipulations, the problem may be in the hardware. On the Redmi 4X, the most common failures are the matrix plumes or the display module itself, in which case only a replacement in the service center will help.

Frequently Asked Questions (FAQ)