How to Make Xiaomi Phone Not Lack: A Complete Guide to Accelerating Android

Have you noticed that your Xiaomi smartphone is slow to open apps, slow down while scrolling or suddenly “think” during games? Lags on Android devices are a common problem, but in 90% of cases it can be solved without going to the service center. The causes of brakes vary from overloaded memory to outdated firmware, and the solutions depend on the model (Redmi Note 12, POCO X5, Mi 11) and the version of MIUI.

In this article, we will analyze the system and hardware factors that affect performance, as well as give step-by-step instructions - from basic (cleaning the cache) to radical (reset to factory settings). MIUI, Xiaomi doesn't advertise, but it can bring your smartphone back to speed, and if you're willing to spend 15 to 30 minutes optimizing, you'll see the results.

1.Diagnostics: Why Xiaomi is starting to lag?

Before you start "treatment," it's important to understand the root of the problem. Lags on Xiaomi fall into two categories:

• 🔄 Programming – caused by errors MIUI, Application conflicts or system overloads, more often after updates or new software installations.
• 🛠️ Hardware - associated with wear of iron (battery, flash memory) or overheating. Typical for devices older than 3-4 years.

To determine the culprit, perform simple tests:

1. Run Settings → About Phone → MIUI Version and press 5 times on “Kerole”; CIT (Xiaomi internal test) will open. Check the CPU Stress and Memory Test items – if the tests fail, the problem is in the hardware.
2. Install the CPU Monitor app from Google Play and watch the processor boot to idle, and if it exceeds 20% without active tasks, malicious software is running on the system.
3. Check the temperature through Settings → Battery → Battery status. Temperatures above 40°C in normal use indicate overheating.

If the diagnostics show software failures, move to the following sections: If the problem is hardware (for example, the wear of mmz memory on the Redmi 4X or Mi A1), you may need to replace components.

⚠️ Note: On devices with Snapdragon processors 4xx/6xx (Like Redmi. 9A, POCO M3) Lags are often associated with trottling, a forced performance decline due to overheating. Solution: replace the thermopaste or use a cooling case.

2. Cleaning the system: remove garbage and cache

MIUI is known for overgrowing its files over time, and even if you don't install games, it creates cache, log files, and temporary data that take up space and slow down work, and let's start with the simplest one: manual cleaning.

Clearing the application cache

Cash speeds up the program, but if it's too much, it gets in the way.

1. Go to Settings → Applications → Application Management.
2. Select an app (like Facebook or YouTube) and click Clear Cache.
3. For mass cleaning, use Settings → Memory → Cleaning (in MIUI 14+ this item is called Deep Cleaning).

Pay attention to apps with more than 500MB of cache – they should be cleaned weekly.

2.2 Delete unnecessary files via Files by Google

Xiaomi’s standard File Manager doesn’t always show all the trash. Install Files by Google from Play Market and:

• 🗑️ In the Cleanup section, remove duplicate photos, old screenshots and downloads.
• 📁 In Memory Analysis, find large files (such as Telegram cache or TikTok).
• 🔍 Check the folder. Android/obb — This is where heavy game data is stored (you can delete it if you don’t use the games).

After cleaning, restart the phone – this will allow the system to re-index files and speed up access to them.

Disabling application background activity

Many programs (especially social networks and instant messengers) continue to run in the background, consuming resources to limit them:

1. Go to Settings → Battery → Battery Mode.
2. Select Optimization and add to the list of apps that shouldn’t work in the background (e.g. AliExpress, Wildberries).
3. For a radical solution, disable AutoRun in the settings of each application.

⚠️ Note: Do not turn off background activity for system processes (e.g. com.miui.home or Google Play Services). MIUI.

3. MIUI Optimization: Hidden Settings for Acceleration

Xiaomi hides a number of features that can significantly improve performance, which are undocumented but work on most devices with MIUI 12-14.

Activation of the performance mode

MIUI has a hidden performance mode that turns off animations and speeds up the system response.

1. Turn on Developer Mode: Go to Settings → About Phone and click on MIUI Version 7 times.
2. Back to Settings → Additionally. → For developers.
3. Find the items: Windows animation - set Off. or 0.5x. Transition animation - set Off.. Background process limit - select Max. 2 process.

These changes will make the interface less glamorous, but will significantly speed up the experience, especially on weak devices (Redmi 8A, POCO C3).

3.2. disabling MIUI Optimization

MIUI Optimization is a proprietary Xiaomi add-on that often conflicts with Android and causes lags. Disabling it can solve the problem with hangings, but requires caution:

1. Activate Developer Mode (see above).
2. In For Developers, find MIUI Optimization and turn it off.
3. Reboot the phone.

After turning off some MIUI features (such as gestures or a dark theme) may work differently. If artifacts appear, return the setting back.

Resetting the graphic settings

If games or videos start to slow down, reset your graphics settings:

1. Go to Settings → Display → Color Mode and select Standard.
2. In Settings → Additional → Graphics (available not on all models) reset the settings to the factory.
3. For games, use Game Turbo (built into MIUI) – it optimizes real-time performance.

4. Firmware Update: When It Helps and When It Harms

Xiaomi regularly releases MIUI updates that should fix bugs and improve performance. However, sometimes newer versions, on the contrary, make the lags worse - especially on older devices (Redmi 5 Plus, Mi 8 Lite).

Checking the relevance of firmware

Old firmware may be the reason for the brakes.

1. Go to Settings → About the phone → System update.
2. Click Check for updates.
3. If you have a new version, download it (preferably via Wi-Fi).

4.2. rollback of firmware when performance deteriorates

If you get a little more lagging after the upgrade, you can return the old version of MIUI.

1. Download the necessary firmware from the official Xiaomi website (choose Stable, not Developer).
2. Rename the file to update.zip and place it in the root of the phone’s memory.
3. Go to Settings → About Phone → System Update, click on the three dots in the upper right corner and select Select a firmware file.

⚠️ Attention: Firmware rollback will erase all data! pre-backup through Settings → Additionally. → Backup and reset.

Alternative: custom firmware

If official updates don’t work, consider custom firmware like LineageOS or Pixel Experience, which lacks the heavy MIUI shell and often works faster.

• 🔓 Unlock the bootloader through the official Xiaomi tool.
• 🛠️ Install TWRP Recovery (informal restoration).
• 📲 Sweep custom firmware (see instructions on the forum) 4PDA or XDA Developers).

This method is suitable for advanced users. Violation of the procedure can lead to a blink (complete inoperability) of the device.

Radical measures: dumping and flashing

If none of the previous methods worked, there are extreme measures: factory reset or full flashing, which will return the phone to its original freshness, but require backup data.

5.1 Hard Reset (Hard Reset)

The reset deletes all user data, but it retains the official firmware.

1. Make a backup of important files (photos, contacts, messages).
2. Go to Settings → Additional → Backup and Reset → Reset settings.
3. Choose to erase all data and confirm the action.

After the reset, the phone will reboot and prompt you to set it up as new.Don't restore the data from the backup right away - check first if the lags have disappeared.

5.2 Firmware through Fastboot

If the reset didn't work, run your phone through Fastboot, which is a more reliable method than updating through Recovery, but requires a PC.

1. Download the Mi Flash Tool from Xiaomi’s official website.
2. Unpack the firmware (.tgz file) in the folder on the computer.
3. Connect your phone in Fastboot mode (clip Volume Down + Power when the device is off).
4. In the Mi Flash Tool, select the firmware folder and click Flash.

It takes 5-10 minutes, and after the firmware, the phone will look like new, but all the data will be deleted.

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Factory reset is the most reliable way to eliminate software lags, but it should be the last option after all other optimization methods.

6. Hardware problems: when to carry in the service

If all the software methods have been tried, but the lags have remained, the problem may lie in the hardware.

Self-repair of iron is fraught with breakdown, so it is better to contact an authorized service center Xiaomi. the cost of diagnosis usually does not exceed 500-1000 rubles.

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Before visiting the service, make a reset settings - this will eliminate the software causes of lags and save time (and money) for diagnosis.

7.Prevention: How to prevent lags in the future

To prevent your Xiaomi from slowing down again, follow the simple rules:

• 📵 Do not install applications from unknown sources (virus risk).
• 🔄 Regularly (once a month) clear the cache through Settings → Memory.
• 🔋 Do not allow the battery discharge below 10% – this accelerates the wear of flash memory.
• 📲 Update apps via Google Play, but don’t install betas (they can be unstable).
• 🛡️ Use light launchers (like Nova Launcher) instead of the standard launcher. MIUI Launcher.

It is also worth turning off automatic downloading of updates for applications (especially games) through the mobile network – this saves traffic and reduces the load on the system.

FAQ: Frequent questions about lags on Xiaomi