How to increase the brightness of the screen on Xiaomi Redmi 7: all the ways from standard to hidden

Xiaomi Redmi 7 is one of the most popular budget smartphones of the brand, but many users face the problem of insufficient brightness of the screen, especially in bright sunlight. Even at maximum settings, the display can seem dull compared to flagships. In this article, we will analyze all possible ways to increase brightness, from basic MIUI settings to hidden functions of the engineering menu and third-party utilities.

It's important to understand that the brightness on the Redmi 7 is hardware-limited: the model is equipped with a IPS- matrix with a maximum brightness of ~400 nits (versus 500+ nits for flagships). However, software tricks allow you to squeeze more out of the screen, as well as fix common auto-adjusted bugs. We tested each method on firmware MIUI 10–14 and identified those that actually work.

If your smartphone gets dim over time, it's not always the matrix's fault, but more often than not, the problem is the misaligned light sensor settings, the energy-saving modes, or even viruses in the system, and below you'll find a diagnosis of the causes and solutions for each case.

1. Basic brightness settings in MIUI

To start with the obvious, check if brightness is limited at the software level. Redmi 7 has two independent controllers for manual mode and autobrightness, and both can get lost after upgrades.

How to open the brightness menu:

1. Swipe down from the top edge of the screen to open the notification bar.
2. Find the “Brightness” slider (the sun icon) and tap it to go to the advanced settings.
3. In the window that opens, turn off the Auto Brightness switch if it is active.
4. Move the slider to the right to the stop – this is the maximum value for manual mode.

If the slider doesn't move or resets, it's a sign of a system failure. Try restarting the phone (hold the power button for 10 seconds). If the problem persists, read the section on resetting the screen settings.

⚠️ Warning: Some firmware MIUI resets the brightness limit after the upgrade to save charge. Check if Battery mode is activated → Energy saving – it forces the brightness to decrease to 70%.

Also on this menu is the hidden "Text Contrast" feature (not available on all MIUI versions), which does not affect the overall brightness, but makes fonts clearer in the sun:

• 🔍 Go to Settings → Display → Text Contrast.
• 📱 Turn on the switch and select High level.
• 💡 The effect is only noticeable when read -- the background remains the same, but the letters get bolder.

Calibration of the autobrightness sensor

The automatic brightness control on Redmi 7 often works incorrectly: the screen dims in the shade or, conversely, blinds in the twilight, the reason for this is a lost light sensor or a polluted area around it (upper left corner next to the speaker).

How to reset the sensor calibration:

• 📱 Open Settings → Display → Autobrightness.
• 🔄 Tap the label Reset calibration (may be called Learning on older versions MIUI).
• ☀️ Follow the instructions on the screen: the phone will ask you to point it at a light source (like a lamp) and then into the shadow.

If you do not have a reset option, use manual calibration through the engineering menu (see section 4). Before you clean the sensor with a soft brush or compressed air - dust and greasy prints distort the readings.

⚠️ Warning: After recalibration, autobrightness may be worse than 1-2 days — that's OK. It takes time for the system to "learn" your preferences. During this period, manually adjust the brightness more often so that the algorithm MIUI adapts.

If the sensor is physically damaged (for example, after a phone falls), the autobrightness will jump chaoticly, and you can check its performance using the Sensor Test application from Google Play. Run a Light Sensor and point the phone at the lamp - values should change smoothly from 0 to 10 000 + lux.

3. Disconnection of energy-saving modes

MIUI aggressively optimizes power consumption, and screen brightness is the first victim of these algorithms. Even if you didn't manually turn on the savings mode, the system can activate it automatically when the battery is low (usually below 15%).

How to turn off forced blackout:

1. Go to Settings → Battery and Performance.
2. Select Battery Mode and set Balanced or Performance.
3. Turn off the Smart Brightness Limit option (if any).
4. In the Energy Saving section, deactivate all switches, including Super Energy Saving.

Also check the settings of individual applications. MIUI can limit brightness for specific programs (such as instant messengers) if they are running in the background.

• 📱 Open the Settings. → Annexes → Application management.
• 🔍 Select the desired application (such as WhatsApp).
• 🔋 Slip the battery and install it without limitation.

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If after turning off the energy saving brightness still drops at low charge, connect the phone to charging - MIUI will remove all restrictions automatically.

4. Hidden brightness settings in the engineering menu

The Engineering Mode allows you to bypass the limitations of MIUI and increase the brightness above standard values. On Redmi 7, this method only works on firmware up to MIUI 12.5 - in new versions, access to brightness is blocked.

How to open the engineering menu:

1. Open the Phone app and enter the combination: ##3646633##.
2. In the menu that appears, select Hardware Testing → LCD.
3. Find Brightness and set the value to 255 (maximum).
4. Save the settings and restart the phone.

If the combination does not work, try an alternative method:

• 📱 Install the MTK Engineering Mode application from Google Play (MediaTek processors only).
• 🔧 Open the Hardware → LCD section.
• 🌡️ Find Max Brightness and zoom in to 255.

⚠️ Warning: Incorrect settings in the engineering menu can cause the matrix to overheat or the battery to be discharged faster. After experiments, return the brightness value to the range of 200-220 if you notice artifacts on the screen (flickering, stripes).

On MIUI 13+ firmware, access to the engineering menu is limited, in which case you can try to bypass the lock via ADB:

adb shell settings put system screen_brightness 255


adb shell settings put system screen_brightness_mode 0

These commands are forced to set maximum brightness and turn off auto-adjustment. They require developer rights to execute them (activated in Settings → About Phone → MIUI version – tap 7 times).

5. Third-party applications to increase brightness

If the standard methods don't work, you can use Google Play apps, and they work on two principles:

1. Software filter – impose a translucent white mask on the screen, creating the illusion of greater brightness (does not increase real threads).
2. Change system settings – require root rights and edit the display configuration files.

Top.-3 Proven applications for Redmi 7:

For applications that require root, you need to unlock the bootloader and install Magisk. On Redmi 7, it takes ~30 minutes and voids the warranty. If you're not ready for such sacrifices, use Lux Auto Brightness:

• 📱 Install the app and grant permission to overlay over other windows.
• ☀️ Select Display → Brightness Curve in the settings.
• 📈 Move the Maximum slider to the right all the way up.
• 🔄 Activate the Apply at Boot option to save the settings after the reboot.

6. Hardware causes of a dim screen

If software methods do not help, the problem may lie in the physical degradation of components:

• 🔋 Illumination wear – over time LED- elements lose brightness (especially noticeable after 2-3 years of use).
• 📱 Display plume detachment – after falls or overheating, the matrix contacts become oxidized, leading to dullness.
• 🔌 A malfunction of the backlight controller—the chip on the motherboard regulates the power supply LED, and its failure leads to uniform dimming.

How to diagnose a hardware problem:

1. Check the screen for the uniformity of the backlight: in a dark room, open a white image (for example, an empty document), dark spots or a gradient at the edges is a sign of wear and tear of the matrix.
2. Connect your phone to charging – if the brightness temporarily increases, it’s the power controller’s fault.
3. Shake the device: if the brightness "blinks", it indicates poor contact plume.

Cost of repair in the service center:

⚠️ Warning: If dimness occurs after moisture is injected, do not try to dry your phone with a hair dryer or rice, this will accelerate the corrosion of contacts. Contact the service within 24 hours: the chances of saving the matrix without replacement are ~70%.

7. Alternative solutions for better visibility

If you can not increase the brightness, to improve the visibility of the screen in the sun will help alternative methods:

• 🌞 Use anti-reflective films, which reduce reflections and increase contrast by 15-20%. Redmi 7 is suitable for a matte-textured film (for example, Spigen Glas.tR EZ Fit).
• 📱 Activate a dark theme — black background on AMOLED- screens (Redmi 7 IPS, but the effect is still noticeable) reduces eye strain. Included in Settings → Display → Dark theme.
• 🔋 Turn off Adaptive Brightness in Google Services: Go to Settings → Google → Devices & Sharing → Adaptive Brightness and deactivate the option.
• 🎨 Change the color scheme to Saturated in Settings → Display → Colors – this will add contrast.

High contrast mode is available for reading outside (available in MIUI 12+):

1. Open Settings → Special Opportunities → Improve visibility.
2. Activate High Contrast.
3. Select the color scheme Black text on a white background.

FAQ: Frequent questions about brightness on Redmi 7

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If none of these methods worked and the screen remains dim, the problem is probably hardware, and 80 percent of the time, the plume of the display or the backlight controller is to blame, and only the service center will help.