Why does the screen go out when talking on Xiaomi Redmi Note 10 Pro

The situation when during a phone conversation the display of the Xiaomi Redmi Note 10 Pro does not turn off is a common problem that many users face. Instead of going out and locking up when you hold the phone to your ear, the screen continues to burn, which leads to accidental tapping of the cheek or ear and resetting a call. This is not only annoying, but also significantly accelerates the battery discharge, since the AMOLED matrix consumes significant energy even at minimal brightness.

The main reason for this behavior is often the incorrect operation of the proximity sensor, which is located at the top of the smartphone body, which is supposed to detect the location of the object nearby and signal to the system to turn off the display. However, software failures, glass contamination or conflict of third-party applications can disrupt the data transmission, causing the phone to ignore your presence.

In this article, we will look at all possible causes of malfunction and suggest effective ways to fix them. We will look at both the software settings of the MIUI shell and the physical factors that affect the operation of the sensor. Understanding the mechanism of operation of the sensor will help you quickly return the device to normal functionality without going to the service center.

Principle of operation and calibration of the proximity sensor

The proximity sensor in the Redmi Note 10 Pro is an infrared sensor that constantly emits invisible light and analyzes its reflection. If the reflected signal exceeds a certain threshold, the system recognizes that the phone is near the ear, and turns off the screen. A calibration failure causes the thresholds to get lost, and the phone stops responding to obstacles.

To check and adjust the sensor, MIUI has a hidden engineering menu that is accessed through a special code. This is the first step that must be done for diagnosis. Enter the command ##6484## in the Phone app or go through the Settings menu → About Phone → MIUI version (you need to quickly tap the build number).

In the CIT menu that opens, select "Proximity Sensor." Here you'll see the current value, which should normally be 5.0 (or close to that). If you close the top of the screen with your hand, the value should change to 0.0. If there are no reactions or values jump, calibration is required.

• 📱 Click the “Calibration” button in the test menu and follow the instructions on the screen.
• 🧼 Wash the top of the display carefully before the procedure to remove dust.
• 🔄 After completion, be sure to restart the device to apply new parameters.

It is important to note that in some firmware versions, access to full calibration may be limited to developer rights. If the standard procedure does not help, you may need to reset your settings via a computer or use specialized utilities, but in 90% of cases, an embedded test is enough.

Conflicts with protective films and accessories

One of the most common but common reasons why the screen on the Xiaomi Redmi Note 10 Pro doesn’t go out is the wrongly pasted protective film or glass.The proximity sensor is located in a narrow frame above the speaker, and if the protective layer overlaps this area or has low transparency for infrared rays, the sensor goes blind.

Especially often, problems arise with cheap security glasses that have a black edge that goes into the sensor area, even a microscopic layer of glue or an air bubble in the sensor area can distort the signal, in which case the phone cannot physically detect that you have brought it to your face.

⚠️ Warning: If you recently replaced the safety glass and the problem came immediately after that, 80% of the time it was the fault.

Some cases with high sides or a solid front panel can partially overlap the top end of a smartphone. Even if access appears to be open, glare from the cover material can trick the sensor into thinking there is no obstacle.

The impact of system settings and “In the pocket” mode

The MIUI shell features a Mode in Your Pocket feature that is designed to prevent accidental taps while the smartphone is in the bag, but the algorithms of this feature sometimes conflict with the proximity sensor, especially if the sensitivity is incorrectly exposed, which can lead to the screen not going out on the call or, conversely, go out too early.

To rule out this factor, check your locking settings. Go to Settings → Lock and Protection → Pocket Mode. Try turning it off completely and check your phone's performance during a call. If the problem has disappeared, it was the software logic of false press protection.

Also, you should pay attention to the design theme settings. Third-party themes downloaded from the MIUI Themes store may contain errors in the code that controls screen behavior during a call. The standard theme "Classic" or "Basic" is free of such bugs.

• 🎨 Return to the standard theme in the “Themes” app».
• 🔒 Turn off the “Mode in your pocket” function for testing.
• 📞 Check the settings of the phone application for updates.

Often users forget that updates to system applications such as Phone or Contacts can also make changes to the logic of work. Go to Google Play or GetApps and make sure you have the latest versions of system components installed.

Third-party applications and memory cleaning

User-installed applications can intercept proximity sensor control, particularly from "optimizers," "memory cleaners," call recording applications, or voice recorders that can block the standard screen-crushing mechanism in an attempt to keep the interface active.

To identify the culprit, analyze when exactly the problem occurred. If you installed a new app shortly before the crash occurred, try removing it. It's also worth checking the permissions issued to the apps: no flashlight program or calculator should have access to the phone's sensors.

Cache of system services can also cause crashes. Clearing the Phone and Google Play apps often helps restore the correct operation. To do this, go to Settings → Apps → All apps, find the right one and select Clean → Clear everything.

⚠️ Warning: Clearing the phone app data will delete your call history, so it is recommended to back up your contacts or sync them with your Google account before the procedure.

If you use gesture control apps or custom launchers, they can also interfere with the sensors, try temporarily turning them off or loading your phone into safe mode to see if the problem will go away without third-party software.

Hardware malfunctions and repairs

If the software methods didn't work and the Redmi Note 10 Pro screen still doesn't go out, there's a high probability of hardware failure. The proximity sensor is a physical component that can fail due to impact, fall or moisture, and in such cases, the software calibration won't work because the sensor just doesn't generate a signal.

A common cause is the sensor plume drifting away from the motherboard.This can happen after a strong impact or poor-quality pre-repair. In the Xiaomi Redmi Note 10 Pro, the sensor is often integrated into the speaker plume or located separately at the top, and its contact can oxidize.

So for diagnostics, you can use a sensor-checking app that shows you a real-time graph, and if the graph is flat and doesn't respond to your hand movements, it's likely that the sensor is dead or physically disabled, and you need to disassemble the device.

Self-repair requires skills and tools, and if you're not confident in your abilities, you should contact an authorized service center, where you will conduct professional diagnostics and replace the defective module.

Resetting and extreme measures

When all methods have been tried, but Xiaomi’s screen continues to burn during the conversation, the radical but effective method remains – a complete factory reset – which will delete all user data and return the software to its original state, eliminating any deep system conflicts.

Before performing a reset, be sure to back up important data to a cloud server or computer. The reset process can be started via the recovery menu: turn off the phone, press the volume and power buttons, then select "Wipe Data".

💡

Use the Advanced Reset feature in the Mi Cloud if you don’t have access to your phone’s menu, but remember that the device must be linked to your account and have internet access.

Don't install all the applications after the reset. First, check the sensor on the clean system. If the problem is solved, it's either software debris or conflict. If the screen doesn't go out after the reset, it's almost guaranteed to be a hardware malfunction.

⚠️ WARNING: A full reset will delete all photos, contacts and installed apps. make sure you have an up-to-date copy of the data before starting the procedure.

In some cases, flashing the device through your computer using the Mi Flash Tool utility helps, but it requires more in-depth knowledge and a suitable firmware image for your regional version.

Frequently Asked Questions (FAQ)

💡

If after a complete reset and check in safe mode the screen still does not go out, the problem is hardware in nature and requires replacing the sensor or plume in the service center.