Why Xiaomi Phone is Braking: All the Causes and Ways to Eliminate

Have you noticed that your Xiaomi is starting to think about opening apps, switching windows slowly, or hanging out for a few seconds? This is a common problem faced by owners of smartphones brand — from budget Redmi to flagship Mi and POCO. 80% of the time the brakes are not associated with hardware and eliminated software methods.

In this article, we will look at all possible causes of lags, from banal cache clogging to hidden errors in MIUI firmware, as well as give step-by-step instructions for diagnostics and repairs. Special attention will be paid to the Xiaomi 12/13/14 series, Redmi Note 10-12 and POCO F/X models, as their owners often complain of hanging after updates. If your phone “gluts” after installing MIUI 14/15 or HyperOS, here you will find a solution.

1. Overloading of RAM (RAM)

The most common reason for brakes is a lack of RAM. Even Xiaomi’s flagship 8–12GB RAM models can “gasp” if 20+ applications are running in the background. MIUI aggressively caches data, leading to artificial memory clogs.

How to check:

• 📱 Open the Settings. → The phone. → Memory and see the usage schedule RAM.
• 🔍 If it is free less than 1 GB, this is a critical level.
• 📊 Settings menu → Annexes → Check how many programs are in the background.

Decisions:

• ⚡ Manual cleaning: click the “Clean” button in the menu Recent apps (swipe up with a delay).
• ⚙️ Limiting background processes: include in Settings → Battery → Performance mode → Limit background processes.
• 🔄 Auto Cleanup: Activate the Settings option → Memory. → Autocleaning RAM (readily MIUI 12+).

⚠️ Note: Do not use "boosters" RAM» Google Play — they only make the problem worse by creating an extra burden. MIUI An optimizer that works more efficiently is already built in.

2. Cache and debris clogging in the system

Over time, MIUI accumulates gigabytes of unnecessary files: app cache, error logs, remnants of deleted programs, which not only takes up space on the drive, but also slows down the reading / writing of data, which causes the phone to "supple" when opening a gallery or launching games.

Critical symptoms:

• 🐢 Slow opening of the Gallery or File Manager.
• 🔄 Long load after restart.
• 📉 Sudden "freezes" when scrolling the tape in social networks.

How to clean:

1. Open Settings → Memory → Clean up and start the scan.
2. Manually remove the cache for heavy apps (Facebook, Instagram, TikTok) in Settings → Apps → [Select App] → Memory → Clear the cache.
3. Use built-in Security → Waste Cleanup (not to be confused with “boosters”!).

3. Firmware problems MIUI or hyperos

More than 40% of complaints about Xiaomi brakes are related to firmware errors, especially after updating to MIUI 14/15 or switching to HyperOS.

• 🔄 The phone started to lag immediately after the update.
• 📱 There are “freezes” when unlocking or opening Settings.
• 🔋 Fast battery discharge + brakes (symptom of the conflict of the core and drivers).

What to do:

• 🔄 Recoil on the old version: if the lags appeared after the update, go back to the previous firmware via Fastboot (instruction below).
• 🛠️ Resetting: Sometimes resetting to factory through Settings helps → Additionally. → Resetting settings (don’t forget to make a backup!).
• 📥 Manual flashing: download the full firmware package for your model from the official website and install through System Update → Three points. → Select a Service Package.

⚠️ Note: Do not install custom firmware (such as LineageOS or Pixel Experience) without experience – this can lead to complete loss of experience. IMEI on some Xiaomi models (especially with MediaTek processors).

4.CPU overheating and trottling

If Xiaomi starts to slow down during games, video or charging, it's overheating. At temperatures above 60°C, trottling (artificial performance decline) is triggered to prevent chip damage. This is normal for heavy loads, but if the phone is warming up in idle, it's a problem.

Causes of overheating:

• 🔥 Clogged radiator (dust, dirt in the case).
• 🔋 Faulty battery (blown, wear and tear).
• 📱 Background processes (mining viruses, crypto mining).
• 🔌 Fast charging (especially on cheap adapters).

How to check the temperature:

1. Install the AIDA64 or CPU Monitor app.
2. Look at the processor temperature (SoC) in plain and under load.
3. Normal: up to 45°C in plain, up to 70°C under load, and if higher, you need to take action.

Decisions:

• 🧹 Cleaning the case: blow the charging and speaker connector with compressed air (do not use wet wipes!).
• 🔋 Replacement of thermal paste: relevant for models older than 2 years (contact the service).
• ⚡ Disabling fast charging: in Settings → Battery → Fast charging (helps reduce heating by 10-15)°C).
• 🛡️ Virus Check: Use Malwarebytes or Built-in Security → Scanner.

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If the phone warms up when charging, remove the case – many Xiaomi models (such as the Redmi Note 11 Pro) have poor heat dissipation in the case.

5. Battery wear and performance limitation

After 500 to 800 charge cycles, the battery capacity drops by 20 to 30 percent, and MIUI automatically limits performance to extend the battery life.

• 🐢 Slowing down animations and transitions.
• 🎮 Lags in games (even in the lungs, such as Brawl Stars).
• 🔋 Sudden shutdowns at 20–30% charge.

How to check the wear:

1. Open Settings → Battery → Battery Status (on MIUI 13+)
2. Or use the AccuBattery app (showing real capacity and wear in %).

Decisions:

• 🔄 Battery calibration: fully discharge the phone, then charge to 100% without interruptions (repeat 2-3 times).
• 🔋 Replacement of the battery: if wear > 50%, contact the service (cost for Redmi - from 1,500) ₽, for flagships - from 3 000 ₽).
• ⚡ Disabling optimization: in Settings → Battery → Select “High Performance” mode (reduces work time but removes lags).

⚠️ If the phone turns off at 30-40% charge, do not delay the replacement of the battery - this can lead to bloating and damage to the motherboard (repair will cost 5-10 times more expensive!).

6. Application conflicts and viruses

Some programs (especially pirated or unverified sources) can block system processes, causing freezes.

• 🦠 Miners (hidden mining of cryptocurrency).
• 📱 Spyware (tracks actions, sends data).
• 🔄 Advertising viruses (pop-ups, browser redirects).

How to detect:

1. Check Settings → Battery → Battery Use – If an unknown app consumes >10% of its charge, it’s suspicious.
2. Open Settings → Applications → Permissions and find programs with suspicious rights (for example, access to SMS or geolocation).
3. Use Malwarebytes or Dr.Web Light for deep scanning.

How to delete:

• 🚫 Manual removal: go to Settings → Apps, find suspicious software and click “Delete” (if the button is inactive – this is a system application, do not touch it!).
• 🛡️ Reset to factory: if the virus is built into the system, only a complete reset will help.
• 🔒 Disabling the installation from unknown sources: Settings → Confidentiality → Special permits → Installation of unknown applications.

💡

The models that are most vulnerable to viruses are bootloader and custom firmware, and if you've been installing unofficial software, go back to stock MIUI.

Hardware malfunctions

If all the software methods didn't work, the problem could be the hardware.

• 💾 Flash memory wear (especially on budget models with eMMC instead of flash memory) UFS).
• 📡 Module problems Wi-Fi/4G (Continuous network searches are loading the processor).
• 🔧 Chip dump (after falls or overheating).
• 🔋 Failure of the power controller (causes "freezes" when charging).

How to diagnose:

If you suspect a hardware problem:

1. Make a backup of data through Settings → Additional → Backup.
2. Please contact the official Xiaomi service (list on the mi.com website).
3. Don’t settle for repairs in informal workshops unless you’re sure of their reputation – there’s a high risk of getting a phone with “donor” parts.

8.Optimize MIUI for maximum performance

Even if your Xiaomi isn’t slowing down, a few tweaks will help speed it up by 15-20%:

• ⚡ Turn off animations: Activate Developer Mode (click 7 times on Version) MIUI In Settings → About the phone. Go to Settings. → Additionally. → For developers, set the scale of the animation window, the scale of the animation transition and the scale of the duration of the animator on the Off..

Limit background activity

• In Settings → Battery → Performance mode, select “Balanced”.
• Turn off auto-run of unnecessary applications in Settings → Permissions → Auto-run.

Disable unnecessary MIUI services

• In Settings → Notifications, disable notifications from Mi Video, Mi Browser, GetApps.
• In Settings → Privacy → Special permissions, disallow access to geolocation for unnecessary applications.

For advanced users:

• 🛠️ Turn it off. MIUI Optimization (removes restrictions on background processes, but can reduce operating time): adb shell settings put global miui_optimization_disabled 1 (required ADB and unlocked loader).
• 🔄 Install an alternative launcher (like Nova Launcher or Lawnchair) to remove the standard shell lags.