What to do if the phone Xiaomi is very hot: the full guide

The situation when your Xiaomi suddenly gets hot is familiar to many owners of these devices, which can occur during charging, during the game or even just waiting for a call, a phenomenon that is alarming, as users rightly fear for the safety of the battery and internal components of the gadget.

High temperature is an indicator that the processor or other elements of the system are working with increased load or are experiencing software failures. In most cases, the problem is solved by software methods, without having to carry the device to the service center. Understanding the physics of the process helps you choose the right strategy for action.

In this article, we will take a look at all the possible causes, from a trivial case to serious hardware malfunctions, learn how to diagnose the problem using built-in MIUI tools, and learn what settings will help reduce heat generation.

The main reasons for overheating of the smartphone

The first thing to understand is that heating is a natural physical process. Electric current, as it passes through the resistance of chips, generates heat. However, when the case of a Redmi or Poco smartphone becomes uncomfortably hot, it signals an imbalance between heat production and the cooling system's ability to remove it.

Often the culprit is the battery, and when you charge, especially fast, the chemical reactions inside the battery are more intense, which is accompanied by heating, and if you use the phone while charging, the load doubles, and the heat sink may not be able to cope.

Another common reason is background processes. Android and the MIUI shell can run a variety of services that consume CPU resources. Sometimes applications "hang" in the restart cycle, forcing the CPU cores to run at maximum frequencies even when the screen is turned off.

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Use heat pads or special stickers to remove heat if you are an avid mobile gamer and regularly load the device for hours.

External factors also play a role: Direct sunlight, using a thick silicone case, or being in a room with high air temperature drastically reduces the efficiency of passive cooling.

Diagnostics: software or hardware problem

Before we take radical measures, we need to determine the nature of the heating, which will help us avoid unnecessary actions, such as resetting data if the problem is in the hardware, or vice versa, ignoring a software bug.

The easiest way is to watch the use case, if the phone only warms in heavy weather. 3D-games or videotapes in 4K, This is the standard behavior of today's high-powered processors, and in such cases, the system itself throttling-it (reduces frequencies) to prevent damage.

However, if the heating is in standby mode or when working with lightweight applications like messengers, the situation requires intervention. Note the battery indicator: if it shows an increase in temperature in the statistics menu, this is a clear sign of software failure or battery degradation.

For more advanced diagnostics, you can use an engineering menu or special applications, enter the dial menu code ##6484## to go into equipment testing mode, and check the temperature sensors and the operation of individual modules.

⚠️ Warning: If the phone heats up to the point where a temperature warning appears on the screen, stop using immediately and let it cool.Ignoring this signal can cause the battery to bloat.

Optimizing MIUI system to reduce temperature

MIUI is rich in features, but some of them can be overly resource-intensive. Disabling unnecessary services is the first step to cooling down. Start by checking the list of running applications.

Go to Settings → Applications → Application Management. Find programs that you rarely use but are constantly hanging in your memory. You should limit their auto-run. You should also check the sync settings: constant data exchange with the cloud warms the communication module.

The high refresh rate (90, 120 or 144 Hz) and maximum brightness significantly increase power consumption and heating. In hot weather or low battery life, it makes sense to switch to a standard 60 Hz.

Also worth paying attention to is the memory extension feature, which uses part of the internal storage as RAM, and while this speeds up work, constant write and read operations can cause additional heat to the memory controller, especially on budget models.

Setup Auto Startup and Background Processes

Controlling what happens under the hood of the operating system is critical, and many applications, especially social media and marketplaces, aim to launch their services as early as possible after the phone is turned on.

To control this mechanism, Xiaomi has a special tool. Go to the Security app (green icon with lightning) and select the Permissions section. Here is the Autostart item. Leave only what you really need instantly (such as instant messengers) on, turn off the rest.

Another hidden resource eater is Google Play. It can freeze when you try to update an app or service. If you notice a strange heat, try clearing the cache of the Google Play service through Settings → Apps → All Apps → Google Play Services → Memory → Clean.

Rules of operation and charging of the device

Physical conditions directly affect temperature. Xiaomi smartphones, especially glass-body models, are sensitive to external heat. Never leave the device in direct sunlight, such as on a car torpedo or windowsill.

Charging is the most critical thing. Lithium polymer batteries heat up when you store energy. If you use your phone while you're charging, you're creating a double load: the battery is warmed by current and the processor is warmed by running tasks. It's a death cocktail for battery health.

Use only original cables and power supplies. Cheap analogues may not follow Quick Charge or Power Delivery fast charging protocols, delivering unstable current, causing the power controller to overheat.

⚠️ Warning: Remove the tight protective case during fast charging or games. Silicone and plastic work as a thermal insulator, preventing heat from coming out, leading to local overheating.

If the phone does get hot, don't put it in the fridge! A sharp temperature drop will cause condensation inside the case, which is guaranteed to short-circuit. Better put it on a cool stone or metal surface.

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The most effective way to cool your phone in an emergency is to turn on the air mode and put the device down on a cold (but not icy) surface.

When a reset or visit to the service is required

If software practices and changing usage habits don't help, the problem may be deeper: There is a scenario where the firmware update went wrong, or there are errors in the system that cause a "cyclical restart" of services.

In this case, a complete factory reset can help. Before you do that, be sure to back up your important data to the Mi Cloud or your computer. Reset will delete all user data and return the system to its original state.

The procedure is done via the menu: Settings → About Phone → Settings Reset → Erase all data. After the reboot, take your time to install all the apps at once. Watch the behavior of the clean phone for a couple of hours.

However, if even after resetting the phone warms up to a simple, or if the heating is localized at a specific point (for example, only around the camera or only at the bottom), this indicates a hardware malfunction.

• 🔋 Battery degradation (internal resistance has grown, battery warms at any current).
• 💧 Oxidation of the board due to moisture (microshort circuits).
• 📡 Communication module malfunction (network search in the area of poor reception).
• 🔌 Power controller failure.

In such cases, self-repair is dangerous. Professional diagnostics are required using a thermal imager and multimeter. Contact an authorized service center for battery replacement or board repair.