Xiaomi phone brakes: what to do to return performance

Your Xiaomi has slowed to open apps, slouching or suddenly overheating? This is a common problem that owners of Redmi, POCO and Mi smartphones face after 1-2 years of use. The reasons for the brakes can vary from cache clogged to worn-out battery. In this article, we will discuss 10 proven ways to return the phone to performance, from simple to radical.

First, let's determine what's stopping you. If the lags appear in specific applications (like games or instant messengers), the problem may be the software. If the phone is slow all the time -- even if you just scrolle through the home screen -- it's probably the system or the hardware. Don't rush the device into service: 80 percent of the time, the brakes are removed by themselves in 10-30 minutes.

1.Cache and garbage cleanup: the first step to speeding up

MIUI uses cache to speed up applications, but over time it accumulates and starts to slow down the phone, and cleaning the cache is the easiest and safest way to get it back up.

• 🧹 Clearing the cache of individual applications: go to Settings → Annexes → App management, select a program (such as Facebook or Instagram) and click "Clear Cache." Repeat to 5-10 the most "heavy" applications.
• 🗑️ Removing unnecessary files: C Settings → Click “Clean” – the system will automatically find temporary files, remnants of deleted programs and other garbage.
• 🔄 Memory optimization: in the same Memory section, tap Optimize – this will close the background processes that eat up resources.

If the built-in tools didn't work, use third-party tools like CCleaner or SD Maid, which scan the system in depth and find debris that MIUI misses. Importantly, don't clear the cache of system applications (such as com.android.systemui) - this can lead to interface failures.

⚠️ Warning: Don’t confuse Clear Cache and Clear Data! The second option will delete all application settings (such as logins in messengers), and you will have to reconfigure it.

2. Disable animation and visual effects

MIUI is known for its beautiful animations when opening applications, switching between screens and folding windows, but these effects consume CPU and RAM resources, which is especially noticeable on budget models (Redmi 9A, POCO M3).

1. Activate Developer Mode: Go to Settings → About Phone and tap on MIUI Version 7 times. You will receive a notification “You have become a developer”.
2. Return to Settings, open the section “Advanced” → “For developers”.
3. Find the items: Windows animation scale → select “No animation” Size of transition animation → “No animation” Duration of animation → “Disable”

Once the animations are turned off, the phone will respond instantly, without delay. This method is especially effective for devices with 2-3 GB of RAM, where every megabyte counts. If the interface seems too sharp, return the animation scale to 0.5x - this is a trade-off between speed and smoothness.

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To quickly turn on/off developer mode, use the search in the settings (the magnifier icon at the top of the screen) and type “For developers”.

3. Optimization of autoboot and background processes

Many apps (especially social networks and instant messengers) run automatically when you turn on your phone and run in the background, consuming RAM. MIUI has a built-in tool for managing autoloads, but it is hidden in the depth of settings:

• 🚫 Disabling Autostart: Go to Settings → Annexes → Application management → Autostart. Turn off autoboot for unnecessary programs (such as games or stores).
• 🔄 Background activity restriction: in the same section "Application Management" select the app → «Limitations» → «Background activity» → «Limit».
• ⚡ Battery Optimization: In Settings → Battery and productivity → Battery Optimization Select “Limit Background Activity” for Energy-Hungry Applications.

For advanced users, there is another way to manually manage processes through ADB, for example, the team below will turn off background activity for Facebook:

adb shell cmd appops set com.facebook.katana RUN_ANY_IN_BACKGROUND deny

Be careful: disabling autoboot for system applications (e.g. com.miui.securitycenter) can disrupt MIUI.

4. Resetting to factory settings: a radical solution

If the phone is slowing down even after cleaning the cache and optimizing, the problem may be the accumulated system errors, in which case the factory reset will help. This method will delete all data from the device, so be sure to back up:

• 📱 Reset via Settings: Go to Settings → The phone. → Select "Erase All Data" (may be called "Hard Reset"). Confirm the action and wait for the reboot (takes the reboot). 5-10 minute).
• 🔧 Reset via Recovery (if the phone doesn't turn on): Turn off the device. Press the Power button + Volume up before the Mi logo appears. From the Recovery menu, select Wipe Data. → Wipe All Data (Management – volume buttons, confirmation – power button).

Once reset, the phone will be like new, without any apps or debris, but remember, this is not a panacea. If the brakes are caused by battery wear or memory chip damage, resetting won't help, and you'll need a diagnosis at a service center.

⚠️ Note: On some models (Redmi Note 8 Pro, POCO X3) post-discharge IMEI. To avoid this, write down before resetting. IMEI (Enter the phone number *#06# and save the screenshot.

Backup photos and contacts|Write it down. IMEI phone|Get out. SIM-card and memory card (if any)|Charge your phone at least 50 times%|Make sure you know your Mi Account (if tied)

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5. Update MIUI to the latest version

Xiaomi performance depends a lot on the firmware version. Older MIUI builds may contain bugs that slow down the system. Upgrading to the latest version often solves the problem of lags.

1. Go to Settings → About the phone → System update.
2. Click on "Check Updates." If a new version is available, download it and install it.
3. If the update doesn’t come automatically, check manually through Xiaomi’s official website (select your model and region).

If your model is no longer supported (like the Redmi 4X or Mi A1), consider installing custom firmware like LineageOS or Pixel Experience, which requires unlocking the bootloader and can be unwarranted, but often gives you a 20-30% performance boost.

Before installing custom firmware, be sure to check compatibility with your model on the XDA Developers or 4PDA forum. Wrong firmware can turn your phone into a "brick."

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Updating MIUI through Recovery (manual) often works more consistently than over the air (OTA), especially if you’ve previously had lags when downloading updates.

6. Checking of battery and cooling

If the phone is not only slowing down, but it's also rapidly draining or overheating, the problem may be the battery, and over time, lithium-ion batteries degrade and their capacity drops, and you can check the status of the battery.

• 🔋 From the engineering menu, type ##4636##, select Battery Information. Look at the health setting, if it shows "bad" or "unknown," it's time to change the battery.
• 📊 Through the application: AccuBattery or AIDA64 They'll show the actual capacity of the battery, and if it's down below 70 percent of the nominal capacity, that's critical.
• 🌡️ Overheating check: install CPU Monitor or Cool Tool to track the temperature of the processor.°C in plain and up to 60°C under load. If higher, you need to clean or replace the heat paste.

If the battery is worn out, it will cost 1,500–3,000 to replace it. ₽ (On some devices (Redmi Note 10 Pro, POCO X4 Pro) the battery can be changed by yourself - there are detailed disassembly guides on the Internet. For models with adhesive battery mounting (for example, Mi 11), it is better to contact the service.

⚠️ Warning: If the phone overheats even in a simple (for example, when watching a video), the problem may be in the thermal interface between the processor and the radiator.

7.Storage optimization: what to do if memory is clogged

Lack of internal storage space is one of the main causes of brakes. MIUI starts to lag when less than 10-15% of memory is free.

• 📁 Transferring data to a memory card: in Settings → Memory. → Default storage select SD-Not all apps can be ported, but photos, videos and music are easy.
• ☁️ Cloud Storage: Use Google Photos (up to 15GB free) or Mi Cloud (5GB) to automatically upload photos and videos.
• 🗃️ Download cleanup: The Download folder is often clogged with unnecessary files, and can be checked through any file manager (e.g. Mi File Manager).
• 🎮 Cache removal: Games like Genshin Impact or Call of Duty: Mobile can take up to three years 10-20 GB to cache. Clean it manually through game settings.

If your internal memory is almost full and you don’t have anywhere to move your data, consider buying a phone with a lot of storage. For example, the Redmi Note 12 Pro+ with 256 GB costs less than 128 GB models, but it will save you years of memory problems.

8.When nothing helps: hardware problems

If you've tried all the software methods, but the phone still brakes, the problem could be the hardware.

• 🔌 Faulty motherboard: microcracks or chip dumps of memory/processor, diagnosed only in the service.
• 💾 Damaged flash memory: If the phone often freezes while reading/writing files, the eMMC chip may be worn out or the phone will be damaged. UFS.
• 🔋 Bloated battery: can press the motherboard, causing failures. Check if the back cover is swollen.
• 🌡️ CPU overheating: If the phone shuts down when loaded, the heat paste may have dried or the radiator is faulty.

The cost of repair depends on the problem:

If the phone is older than 3-4 years (for example, Redmi Note 7 or Mi 9), repair may not be cost-effective, in this case it is logical to consider buying a new device. For example, the POCO X6 Pro with a Dimensity 8300-Ultra processor will work many times faster than the old models even with custom firmware.

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Before visiting the service, make a backup of data – hardware repairs often require a complete reset.

FAQ: Frequent questions about brakes on Xiaomi