The situation when the once-quick Xiaomi or Redmi suddenly becomes annoying with delays, hanging in the menu and long launch of applications is familiar to many users. This does not always mean that the device has failed or it is time to buy a new gadget. Most often the problem lies in the software “layers”, crowded cache or incorrect settings of the MIUI interface.
In this article, we'll take a systematic approach to diagnosing and eliminating lags. You'll learn to distinguish software failures from physical memory wear, properly clean system debris, and adjust hidden animation settings to instantly respond to the screen. Optimization is not just cleaning up RAM, but a set of measures that will return the smartphone to its old abruptness.
Before we go to radical measures like a complete reset, it’s worth analyzing the current state of the system. Often, just a few simple steps are enough to make Android work like a clock. Let’s look at the main reasons why Xiaomi’s smartphone slows down and how to fix it without losing personal data.
Diagnosis: Why the phone freezes and warms
The first step is always to identify the root of the problem. If your Xiaomi is slow, the reasons can be trivial: crowded internal memory or background processes that devour resources. Android requires free space for the proper functioning of virtual memory; if free less than 10-15%, lags are almost guaranteed.
Another factor is overheating. When the temperature rises, the processor automatically resets frequencies to avoid damage, which instantly affects performance, and this is especially true for the low-end models of the Redmi and Poco series when you are using navigation or games intensively, and it is also worth checking whether heavy applications are running in the background that you have not used in a long time.
⚠️ Attention: If the phone is heated even in downtime and discharges quickly, it is possible that one of the applications is "eating" the CPU resources in the background.
You can use built-in tools or third-party tools to diagnose accurately, and it's important to understand the difference between a lack of RAM and a lack of permanent storage. RAM is needed for applications running right now, and ROM is needed for storing files and the system itself.
Cleaning up memory and removing system debris
The most efficient way to speed things up is to make room. There's a built-in Security app in the MIUI shell that allows you to quickly clear the cache. However, for deep cleaning, you'd better go through the main folders manually. Delete the folders with the log files, the temporary messenger files and the remnants of the remote programs.
Pay special attention to the DCIM/Camera folder and social media cache. Telegram and WhatsApp can take up tens of gigabytes, saving all photos and videos viewed. Clearing the cache in the application settings is safe - your correspondence and media files will remain in place, only temporary data will be deleted.
☑️ Checklist for quick cleaning
Remember the Download folder, and over time, installation files accumulate. APK, PDF-Deleting them instantly frees up space and reduces the load on the file system when indexing.
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Use the Deep Clean feature in the standard Security app, but carefully check the file list before deleting so you don’t lose important documents.
Optimization of MIUI interface and animations
The visual smoothness of the interface is often perceived as the overall speed of the smartphone. If the animations are too long, the phone seems slow. In the developer menu, you can zoom in on the animations, making the transitions between the screens instantaneous. It doesn't add power to the processor, but it subjectively speeds up the work.
To get into the developer menu, you need to click on the build number several times in the About Phone section. Then, in the advanced settings, look for "Additional" or "For developers." We are interested in three parameters: "Scale of window animation", "Scale of transition animations" and "Duration of animations."
It is recommended to set these settings to 0.5x or even turn them off completely (without animation).It is also worth turning off the memory extension function if you have less than 4 GB of native RAM, since using slow flash memory as RAM can cause micro-freezes.
| Animation parameter | Standard value | Recommended for speed | The effect |
|---|---|---|---|
| The scale of window animation | 1x | 0.5x | Acceleration of opening/closing applications |
| Scale of transition animation | 1x | 0.5x | Quick transition between desktops |
| Duration of animation | 1x | 0.5x | General acceleration of interface response |
| Background limit of processes | Standard. | No more than 2-3. | Reducing the RAM load |
Changing these settings is the safest and most effective way to accelerate older Xiaomi models without losing data.
Managing Autoboot and Background Processes
Many applications tend to run with the system and continue to run in the background, using up charge and resources. MIUI has a powerful tool for managing booths. Turn off all unnecessary things: marketplaces, social networks that you rarely use, and brand services.
Also check the battery settings for each application. For programs that don't have to send notifications instantly (like games or stores), set the "No Limits" power saving mode only if it's critical, otherwise it's better to leave the standard or restrictive mode.
What is MIUI Optimization?
Check your list of apps that you're running regularly, and if you see programs you're not using right now, force them to stop, and if you're constantly running navigators or music streaming in the background, it can stifle the main processor.
System update and resetting
Often performance issues are solved by a firmware update. Xiaomi engineers regularly release patches that optimize the processor and fix memory errors. Go to Settings → About Phone → MIUI version and check for updates.
⚠️ Before updating your firmware, be sure to back up important data in the cloud or on your PC, as in rare cases the process can go wrong.
If the update didn't work and the phone still slows down, the last resort is a full factory reset, which will remove all data, apps and settings, returning the phone to the "out of the box" state, often addressing the problem of accumulated software debris that can't be manually removed.
To reset, go to Settings → About Phone → Settings Reset → Erase all data. The process will take a few minutes, after which you will get a clean system. It is a radical, but often the only way to resuscitate a device that is slow to run for a long time.
When iron replacement or repair is needed
Software methods don't always help. If the phone continues to slow down after resetting and cleaning, there may be a problem with physical wear and tear. Flash memory has a limited lifetime of write cycles; over time, it degrades and starts to work slower, causing lags throughout the system.
If the battery is worn out and can't deliver the right current, the system can artificially limit performance (trottling) so that the phone doesn't turn off in the cold or under load. Replacing the battery at the service center can give the device a second life.
In some cases, the cause may be a failure of the power controller or overheating of the processor due to dried thermal paste. If the phone warms up in the upper part of the case, even for simple tasks, this is an occasion to contact the service center for diagnosis.
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If a full reset does not fix the lag, the problem with a 90% probability lies in the physical wear of the memory (eMMC/UFS) or processor, and software cannot fix it.