The situation of a smartphone suddenly picking up the phone or dropping a call without you, is familiar to many owners of Xiaomi, Redmi and Poco devices. It is not a mystery or a sign that the gadjon was hacked by hackers. Most often the problem lies in improperly configured system functions or contamination of the sensor.
Android, with its MIUI or HyperOS shell, has a lot of automation scenarios that are designed to make life easier for the user, but when sensors are not working properly, these functions get in the way. You don't have to bring the device to the service, because in 90% of cases, the problem can be solved by yourself through the settings menu.
In this article, we will go into detail all the possible reasons why the phone is behaving strangely, we will go through the hidden menu of engineering checks, call settings and touch screen hygiene rules, carefully follow the instructions to regain control of your device.
Response to swipe and gesture management
The most common reason a smartphone answers calls itself is because of its motion response function. In the Xiaomi system settings, there is an option to pick up the phone if you hold it to your ear or flip it down with the screen, and if this function is activated and the sensors are operating with an error, the call will be received by accident.
To check and disable this option, you need to go to the call settings menu. The path may vary slightly depending on the version of MIUI, but the logic remains the same. Find the section responsible for incoming calls, and carefully study the switches associated with gestures.
- 📱 Open the phone application (green handset).
- ⚙️ Click on three dots or a gear in the corner to enter the settings.
- 🖐 Find the option “Mode in your pocket” or “Swipe answer».
- 🚫 Turn off the function "Put to the ear for a response».
You should also pay attention to the Pocket Mode feature, which is designed to block random taps when the device is in the bag, but if the screen is contaminated or the security glass is poor, the system can falsely detect where it is in the pocket and block or activate calls.
⚠️ Warning: If you often wear your phone in tight-fitting jeans, the “Mode in your pocket” feature can cause false touchscreen positives, leading to an automatic response.
Problems with proximity sensor and calibration
If the gesture settings are fine, but the device continues to behave unpredictably, the culprit may be the proximity sensor, which is a small sensor on the top of the screen that detects whether the phone is near your ear, and if it gets contaminated or malfunctions, the screen can go out or react to non-existent touches.
Xiaomi owners can do their own diagnostics through the engineering menu, which is a hidden part of the system, accessible through special code, and don't be afraid to use this tool, it's designed to test the hardware and won't hurt your data.
To enter the check mode, enter the following code in the "calling phone":
##6484##
Once you enter the code, the CIT menu will open. Find the "Proximity sensor" item in the list. Do the test by covering the top of the screen with your hand. The indicator should change from 5.0 to 0.0. If there is no reaction or values jump, calibration is required.
How to Calibrate the Sensor in CIT
In the CIT menu, select Proximity sensor. Put your phone on a flat surface without covering the top. Press the Calibrate button. Wait for a success message. If the calibration fails, it may be that the sensor is physically damaged or contaminated with the adhesive from the protective glass.> Often the problem lies in banal dust or greasy plaque. Wipe the top of the screen with soft cloth. If you have recently changed the security glass, make sure that it does not overlap the sensor. Cheap glasses often have poor transparency for the IR ray sensor. The effect of the protective glass is not directly affecting the sensor, and the sensor's s lighting, which causes the sensor to interfere with the sensors and the sensor to interpret the sensor's. Some models of book covers or bumpers with a magnetic fastener can magnetize the sensors of a smartphone. The magnetic field can be perceived by the system as a signal to close the lid or place in a pocket, which provokes an automatic response to a call. 🧲 Remove the cover and check if the problem persists. 💎 Make sure the protective glass has no chips in the upper part. 🧼 Carefully degrease the surface of the screen with an alcohol napkin. 🔌 Turn off the external headsets and check the behavior without them. If after removing the accessories the problem disappeared, then it was because of them. In this case, it is recommended to replace the glass with a better one, for example, with oleophobic coating and cutouts for sensors, or to refuse to use dense cases. Bluetooth settings and headsets Sometimes the phone answers calls by itself due to connected Bluetooth devices. Headphones, smartwatches, or car headsets can have their own control buttons. A random tap of the headphone button in your pocket or bag can be perceived by the phone as a "Accept Call" command. Android has settings that allow external devices to manage calls. If you’re actively using wireless gadgets, check their settings in the Bluetooth menu. Disabling Auto-Response on the headset itself (if supported) can also solve the problem. Also, check the list of connected devices: If you have a device you haven’t used in a long time (like an old speaker in another room) connected to your phone, it can create background noise or signals that confuse the communication module. ⚠️ Note: Some cheap Bluetooth headphones don’t have protection against accidental pressing. When carried in your pocket, they can press the control button themselves, forcing the phone to answer calls. App conflicts and third-party software Not only system settings, but also third-party applications can intercept call management. Advertising modules, memory cleaners or conversation recording applications often request excessive permissions. In the background, they can activate auto-response functions for their purposes. Analyze which applications you installed recently. If a problem appears after installing a new program, try to delete it. Pay special attention to programs that have access to the microphone and phone. If you run the applications in this mode, it is your fault that you run the applications in the system alone. Application type Conflict probability Recommendation Call recording High Check autoresponse settings in the Antivirus Average Disable real-time protection Task Managers Low Delete the application Voice assistants Average Disable voice activation 💡Use the built-in antivirus in Xiaomi's Security app to scan the system for malware that can manage calls. SIM-Rarely, but it happens that the problem lies not in the smartphone itself, but in the smartphone. SIM-- on the phone or on the phone. SIM-The cards may be unstable, transmitting erroneous signals, and operators may provide services such as "Autoresponder" or "Autodetector" that conflict with the functions of the phone. SIM