Modern Xiaomi, Redmi and POCO smartphones are equipped with powerful processors that emit a significant amount of heat during intensive work. Periodic heating of the case is normal, especially during the launch of heavy games or fast charging, but excessively raising degrees can indicate a failure in the cooling system or background processes. It is important for users to understand when the device is working normally and when intervention is necessary.
Control of thermal mode allows you to extend the life of the battery and prevent trotting, a forced reduction in the performance of the processor to protect against overheating. The MIUI operating system and the new HyperOS do not have a single button to output accurate data in degrees to the main screen, which often leaves owners at a loss. There are several proven diagnostic methods, from built-in system utilities to third-party software.
In this guide, we will discuss all the current ways to obtain accurate data on the thermal state of your gadget. You will learn to use hidden engineering koi, system reports and specialized applications for deep analysis. The critical threshold for safe operation of most mobile processors Snapdragon and MediaTek is a temperature of 45 ° C, exceeding which requires immediate reduction of load.
Use of the built-in "Security" application
The most affordable and safe way to do initial diagnostics is through a standard system application pre-installed on all of the brand’s devices, which doesn’t show the exact temperature in Celsius in real time on the home screen, but it does an efficient analysis of the system’s state, and when anomaly is detected, the program itself signals the problem, suggesting that background services work better.
To run the check, you need to find an icon on your desktop called Security and run the scan. The system will check for viruses, free memory and current CPU load. If the phone overheats, the interface will display a warning advising you to close heavy applications or reduce the brightness of the display.
Inside the app, there is a Battery section where you can see the wear percentage and approximate heating status, albeit in descriptive form (e.g., "Normal" or "High"), a basic tool that is suitable for daily monitoring but does not provide technical information for in-depth analysis of overheating causes.
- 📱 Open the app menu and find the Safety label with a green shield.
- 🔍 Click the “Security Check” button to start automatic system scanning.
- 🔋 Go to the Battery section to view detailed energy consumption statistics.
⚠️ Attention: Built-in optimizer can aggressively close the background processes, which sometimes disrupts the work of messengers. Set exceptions for important applications in the Settings menu» → «Annexes» → «Permits».
It is worth noting that the functionality of the built-in scanner depends on the firmware version. In global versions of MIUI, reports may be less detailed than in Chinese builds. For the average user, this tool is enough to keep the device clean.
Check through CIT’s engineering menu and hidden coys
To get accurate technical data, Xiaomi engineers have provided a special diagnostic menu known as CIT (Customer Integration Test), which is accessed through a set of special combinations of characters in the Phone application, which allows you to see the real performance of sensors without installing third-party software.
To get into the test menu, open the standard call and dial the code ##6484##. The screen will instantly open a list of dozens of tests to check different modules: screen, speakers, sensor and, of course, battery.
The window that opens displays the current charge, voltage and, most importantly, the battery temperature in real time, and updates the data every second, allowing you to track the dynamics of heating under load, which is the most reliable way to get honest numbers directly from the power controller.
What if the code doesn't work?
| Parameter | Normal value. | Critical significance |
|---|---|---|
| Temperature at rest | 25°C – 35°C | Above 40°C. |
| Temperature under load | 38°C – 45°C | Above 50°C. |
| Battery voltage | 3.7B - 4.4B | Below 3.4B |
| Health status | Good | Overheat / Bad |
Using the engineering menu is safe for warranty, as you only read the data, not make changes to the system files. However, it is not recommended to press the Fail buttons or run cyclic tests without the need to create artificial load on the components.
Temperature monitoring through third-party applications
If there is not enough built-in tools, Google Play Store tools come to the rescue, providing advanced statistics, temperature graphs, and temperature information on individual cores of the processor, not just batteries, to help diagnose the causes of overheating in depth.
One of the most popular and informative solutions is the CPU-Z or AIDA64 application. After installation and launch, you need to go to the Thermal or Battery tab, which displays a detailed temperature map: SoC (system on a chip), individual CPU cores, GPUs and environmental sensors.
Another powerful tool is AccuBattery, which specializes in battery health, but also shows the current temperature in the desktop widget, which allows you to track how fast your phone is heating while charging, and calculates battery wear based on temperature conditions.
- 📥 Download the app CPU-Z or AIDA64 from the official Play Market Store.
- 📊 Run the program and wait for data collection from all sensors of the device.
- 🌡️ Note the Temperature option in the Battery or Thermal section.
⚠️ Warning: Avoid installing questionable coolers that promise to bring down the temperature software, at best they just shut down processes (like the built-in optimizer), and at worst they contain ads and miners that heat the phone even more.
Using third-party software gives a more complete picture, especially if you're overclocking or testing the limits of a smartphone, and graphs help you see the correlation between running games and temperature spikes.
Real-time temperature analysis
It is important for gamers and testers to see the metrics right while using the device without folding the game or app. MIUI and HyperOS have a built-in tool called Game Turbo that has its own overlay for monitoring.
When you run a game through the Game Turbo, you see a toolbar on the side, and if you swipe towards the center, you can see the current load on the CPU and GPU, and you can see the temperature indicator. Although the exact numbers in degrees are not always shown there, the color indicator (green, yellow, red) clearly indicates the current state.
For more advanced users familiar with ADB (Android Debug Bridge) debugging, there is the option of displaying temperature to log files or to the screen via third-party overlays such as FPS Monitor.This requires a computer connection and command input, but gives maximum detail.
adb shell dumpsys battery | grep temperatureThis command, executed in the console of the connected device, will output the current value of the battery temperature. For constant monitoring in real time, you can use applications with the function of "floating window" that draw on top of other small widget programs with numbers.
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For the most accurate measurements during games, turn off the Auto-Brightness function. The light sensor located next to the processor may introduce additional errors in the measurement of the temperature of the case.
Real monitoring helps us understand whether the overheating is due to system optimization or physical heating of components, and if the temperature is normal in the simple and the game rises sharply to 50°C, the problem is the load on the GPU.
Temperature standards and causes of overheating
Understanding what is normal and what is pathological is critical to a smartphone owner, because temperature is a physical law, and you can't completely avoid heating when you're running electronics, but you need to know the limits of what's permissible.
The comfortable temperature for lithium-polymer batteries is considered to be a range from 20 ° C to 35 ° C. When charging or active operation, heating to 40-42 ° C. In this range, chemical reactions inside the battery are effective, and the degradation of materials is minimal.
When the numbers are above 45°C, the power management system starts to limit the charging current to prevent the electrolyte from boiling. When you reach 50-55°C, the trottling turns on: the screen dims, the processor frequency drops, and the phone can become sluggish (slow). Above 60°C, the device can emergency shut down.
- ☀️ Direct sunlight heats the body faster than the processor, distorting sensor readings.
- 🎮 Heavy. 3D-Games by Genshin Impact, PUBG) create a peak load on the graphics core.
- 📶 Weak cellular signal makes the modem run at maximum power, causing strong heating of the lower part of the board.
⚠️ Warning: If the phone is heated to a hot state (more than 45)°C) in standby mode (screen turned off, system processes only running), this is a sign of a “sleeping” malicious application or a malfunction of the power controller.
A common cause of abnormal heating is a faulty battery or oxidation of contacts, and it is also worth checking whether the body has deformed - the bloated battery is heated unevenly and is dangerous.
Methods of cooling and prevention
If you’ve figured out how to check the temperature of a Xiaomi phone and you see high values, you need to take cooling measures. Software methods (coolers) are not effective against physical heat, so you need a comprehensive approach.
First of all, remove the protective case if it is thick or made of materials that do not conduct heat well (skin, dense rubber).The metal case of the smartphone is itself a radiator, and the case interferes with the removal of heat into the environment.
Reduce the refresh rate of the screen. If you have a model with a 120Hz or 144Hz display, switching to 60Hz in settings (Settings → Screen → Update) will significantly reduce the load on the GPU and processor, reducing heat.
☑️ Checklist for temperature reduction
Use external coolers for mobile devices if you are an avid gamer. These small fans attached to the back cover can remove heat more efficiently than any software optimizations, and it also helps to install your smartphone on a cold surface (pot, glass, metal) during charging.
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The most effective way to cool your phone is to remove the case and put the device on a cool surface (not in the refrigerator!) for 5-10 minutes, allowing the heat exchange to level the temperature naturally.
Regularly restarting the device (at least once a week) helps to reset the system processes that can quietly load the processor.