The situation when the once-fast Xiaomi Redmi suddenly begins to react to touches with a noticeable delay is familiar to many users: the screen freezes when swiping, applications open longer than usual, and the animations of the MIUI interface turn into slideshows. This is not always a sign of critical failure, often the problem lies in software conflicts or overflow of the system cache.
Understanding the root of the problem is half the success of solving it: Smartphone hardware is limited, and over time, the Android operating system is becoming overrun with temporary files that interfere with the normal operation of the processor, and owners of Redmi Note devices and Redmi 9A/10C budget models face this more often due to less RAM.
In this article, we'll look at not only standard cleaning techniques, but also hidden settings that really affect performance. You don't have to be an expert in programming to get your gadget back to speed, but the main thing is to consistently go through all the diagnostic points, eliminating possible causes of slowdown.
Overflow of internal memory and cache files
The most common, but most common, reason why a phone brakes is critically filled storage, where when the free space on the system partition drops below 10-15 percent, the Android operating system can't efficiently perform swap operations (virtual memory), which causes even simple tasks like typing to be delayed.
This is especially true for models with 64 GB of memory, where after installing all the necessary applications and downloading photos, there is very little space. The MIUI system tries to free up resources by constantly unloading background processes, which visually perceives as lags and hangings.
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Use the built-in Security app for quick cleaning, but for deep analysis it’s better to download Files by Google, which finds duplicates and forgotten downloads.
To fix this, you need to manually analyze what takes up space, often it's a messenger cache like Telegram or WhatsApp that can grow to tens of gigabytes. Cleaning up just through the application settings may not be enough, and it's better to use the built-in cleaning tools inside the messengers themselves.
- 🗑️ Remove old screenshots and downloaded files from the Download folder that are often forgotten for months.
- 📸 Check the gallery for video in the 4K, They are very expensive and rarely needed in their original form.
- 📱 Clear the cache of heavy apps: TikTok, Instagram and browsers store huge arrays of temporary data.
Once the space is free, it is recommended to restart the device, which will allow the system to redistribute files on the disk and optimize the file system, and if the smartphone is still slow, then proceed to the next stage of diagnostics.
Processor overheating and trottling
Modern processors in Xiaomi Redmi are equipped with protection mechanisms that force the clock speed to decrease as the temperature rises, a process called trottling. If you notice that the phone starts to lag while playing, video shooting or even navigating, the heat fuse most likely went off.
High temperatures not only affect battery life, but also battery life, and frequent overheating can cause the battery to bloat and the plumes inside the housing to detach, so you can't ignore the heat even if the device is just lying on the table and warming up.
⚠️ Note: If the smartphone case is heated at rest (without running apps), this may indicate background mining malware or a power controller malfunction.
To combat overheating, it’s worth checking which apps consume the most power in the background, often with poorly optimized games or aggressive ads that continue to load the processor even after closing.
Using thick silicone cases in hot weather also contributes to heat accumulation: in summer, it is better to remove protection or use perforated covers for better ventilation. If a hardware problem, for example, a thermal paste dried out (relevant to older models), only a service center will help.
Lack of RAM (RAM)
RAM is your device's desktop. The more applications you have open at the same time, the more space you need. In the MIUI shell, memory management is quite aggressive, but when you don't have enough resources, you start to reboot your background services, which causes noticeable jerks in the interface.
Users often keep dozens of tabs open in their browsers and many social networks, each tab taking up a segment in RAM. When the limit is exhausted, the phone starts to run slowly as the processor spends time switching between tasks rather than completing them.
The Memory Extension feature, which is available in the new Redmi Note 12/13 and others, uses some of the internal memory as virtual RAM, which helps keep more applications in the background, but the speed of virtual memory is lower than that of physical memory.
- 🚀 Close unused apps through the recent task menu, especially heavy games.
- ⚙️ Turn off automatic memory expansion if you have less than 6GB of physical memory RAM, Because it can slow down the work.
- 🔍 Check the autoload list and disable the start of unnecessary services along with the phone turning on.
You can find the "Background Process Limit" setting in the developer settings, and setting a limit on 2-3 processes can free up resources for an active task, but be careful: too tight constraints can disrupt messengers, and notifications will stop coming in time.
Failures in the operation of the MIUI shell and launcher
The MIUI shell (or HyperOS in newer models) is a superstructure over Android that takes over the interface. It is the launcher (desktop system) that is most often responsible for the smoothness of animations and the response to touch. If the system launcher "weighs," the phone will appear slow, even if the hardware is working properly.
Often the problem lies in the accumulated errors after the system updates, the files of the old version can conflict with new libraries, and widgets, live wallpaper and heavy themes that constantly consume the resources of the GPU are also influenced.
Hidden animation settings
Resetting the launcher settings can bring back responsiveness, so you need to clear the System Launcher app data in your application settings. Don't worry, your icons and folders will stay in place, but the widget settings may get lost.
If you have installed third-party launchers (Nova, Microsoft Launcher), try to temporarily return to the standard. Third-party shells are not always correctly optimized for the specifics of Xiaomi and can cause interrupt conflicts.
Problems with flash memory and wear of the drive
Over the years, the smartphone's built-in memory has degraded. Memory cells have lost the ability to write and read data quickly. It's a natural physical process that's especially noticeable on devices with the type of eMMC memory common in budget Redmis. Reading speed can drop by many times, causing long app downloads.
It is difficult to understand the degree of wear and tear without special equipment, but the indirect sign is the appearance of errors when writing files or sudden crashes of applications with a message about a database error. If the phone is old (3-4 years of active use), this is the most likely cause.
The radical solution is to completely reset to the factory formatting settings, which would re-mark the memory sectors and could temporarily improve the situation by eliminating the broken sectors from the core, but if the degradation is physical, the effect would be short-lived.
| Type of memory | Speed (exemplary) | Recording resource | Impact on speed |
|---|---|---|---|
| eMMC 5.1 | up to 400 MB/s | Low. | Noticeable lags in 1-2 years |
| UFS 2.1 | up to 800 MB/s | Medium. | Stable work 2-3 years |
| UFS 3.1 | up to 2,000 MB/s | High-pitched | Minimal impact on speed |
Owners of eMMC devices should be especially careful about the free space, and filling such a drive “to the end” catastrophically reduces its already slow recording speed, turning the use of a smartphone into torture.
Malware and background advertising
Installing applications from unverified sources is a direct way to infect Android with viruses-miners or advertising software. Such programs disguised as system processes or harmless utilities (lightlights, cleaners), but in the background load the processor 100%.
Signs of infection include spontaneous opening of desktop ads, fast battery drain, standby heat and severe interface braking. Unlike a PC, on Android, viruses are often not visible in the task manager under their own names.
⚠️ Warning: If after installing a cleaner or accelerator, the phone starts to work worse, immediately delete this application.
To find the culprit, go to the app settings and sort them by the time of last use. Suspicious processes with unknown names or without an icon should be checked through Google Play Protect or Dr.Web Light antivirus.
☑️ Virus testing
Safe mode helps diagnose the problem: if it is fast, then the third-party application is to blame. In safe mode, only system services are launched, which allows you to exclude the influence of user software.
Outdated software
App developers are gradually phased out of support for older versions of Android, new versions of messengers and social networks are becoming heavier and require more resources that the old hardware and software can not provide, which leads to mismatches and lags.
In addition, older firmware versions may contain bugs that have been patched in security updates. However, on very old Xiaomi models, installing the latest available firmware sometimes slows down due to the increased demands of the new shell.
If your model is no longer getting updates, consider installing custom firmware (like LineageOS), which may be lighter and more optimized than stockware, but it requires technical skills and carries the risk of losing warranty or breakdown.
In normal mode, check for updates in the Settings menu → About Phone → MIUI version. Sometimes the automatic update does not work, and the current patch must be installed manually through the file selection menu.
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Regular updates to apps through the Play Market are more important for speed than updating the system itself, since the software is optimized for current versions of the OS.