Has your smartphone on Android started to freeze, applications open with a delay, and animations twitch? This is a common problem faced by owners of devices even from top brands - Samsung, Xiaomi, Realme or Google Pixel. The reasons for the brakes may lie in clogged memory, system failures, outdated software or hardware limitations. In this article we will analyze all possible reasons and give step-by-step guide on how to restore your phone's performance - from basic methods to deep optimization.

We'll warn you right away: not all lags require radical measures like resetting to factory settings. In 80% of cases, it is enough to clear the cache, disable unnecessary processes or update the firmware. But if the phone slows down even after these steps, the problem may be more serious - from a worn-out battery to hardware faults. We have structured the solutions by degree of complexity: from the simplest to the most advanced, so that you can choose the best option.

1. Diagnostics: why did Android start to lag?

Before starting treatment, you need to make a diagnosis. Brakes can manifest themselves in different ways:

  • 🐢 Slow animation — transitions between screens are jerky, swipes are delayed.
  • ⏳ Long loading of applications —even light apps like Telegram or Google Maps take 5-10 seconds to open.
  • 🔄 Spontaneous reboots —the phone suddenly turns off and turns on.
  • 🔥 Overheating —the case becomes hot even under minimal load.
  • 📉 Fast discharge batteries —the battery runs out in a few hours during normal use.

Main causes of brakes:

Type of problem Signs Probability (%)
Clogged memory Less than 1 GB of free space, frequent notifications about low memory 60%
Background processes The phone heats up without load, the battery runs out quickly 50%
Outdated software There have been no system updates for a long time, standard applications are buggy 40%
Viruses/malware Unknown applications have appeared, advertising in the status bar 20%
Hardware faults Lags after falling/moisture, artifacts on the screen 10%

Critical moment: if the phone starts lag after updating Android (for example, from version 13 to 14), the problem may be in unoptimized firmware for your model. In this case, only rolling back to the previous version or waiting for a patch from the manufacturer will help.

📊 How often does your smartphone start to lag?
Constantly
After launching heavy games/applications
When the battery is low
After updating the system
Other

2. Freeing up memory: quick ways

Lack of free space is the most common cause of slowdowns. Android needs at least 1-2 GB of free memory for stable operation. If this threshold is violated, the system begins to freeze because it cannot properly manage the cache and temporary files.

How to check free space:

  1. Open Settings → Storage.
  2. Look at the memory distribution diagram. If the "System" or "Other" segment takes up more than 30%, this is an alarming signal.
  3. Click on a category (for example, "Applications") to see the most "gluttonous" apps.

Ways to free up space:

  • 🧹 Clear cache: Go to Settings → Applications → [Select application] → Storage → Clear cache. For bulk cleaning, use applications like CCleaner or Files by Google.
  • 🗑️ Removing unnecessary files: Check folders Download, DCIM (photo/video), WhatsApp/Media (media from chats). Remove duplicates using Duplicate Files Fixer.
  • 📱 Transferring data to a memory card: If your phone supports microSD, transfer photos, videos and music. Settings → Storage → SD card select "Format as internal storage" (attention: after this the card will only work with this phone!).
  • ☁️ Cloud storage: Upload photos and videos in Google Photos (free up to 15 GB) or Yandex.Disk, then delete local copies.

☑️ Checklist for clearing memory

Done: 0 / 5
⚠️ Attention: Do not use "memory optimizers" from Google Play —many of them consume resources themselves and show false warnings. The built-in Android tools are enough.

3. Optimizing background processes

Even if there is enough memory, the phone may slow down due to background processes applications that continue to run after closing. They consume RAM (RAM), processor and battery. Social networks (Facebook, Instagram), instant messengers (Viber, WhatsApp) and games are especially aggressive in this regard.

How to reduce the load:

  • 🚫 Limiting background activity:
    1. Go to Settings → Applications → [Select an application] → Battery not on all firmware). Settings → Applications → [Select an application] → Battery.
    2. Select "Limited" background activity mode.
    3. For a radical solution: Settings → Accessibility → Optimization → Limit background processes (not available on all firmwares).
  • ⚡ Disabling autorun: In the same application settings, find “Autorun” and disable it. This will prevent the app from automatically starting when you turn on the phone.
  • 🔄 Forced stop: In the application menu, click "Force stop". Attention: this is a temporary solution - the application will start again the next time you open it.
  • 📵 Power saving mode: Activate it in Settings → Battery → Power saving mode. This will limit background activity and reduce the processor clock speed.

    • For advanced users: use ADB (Android Debug Bridge) to manually limit processes. For example, the command below disables background activity for Facebook:

    adb shell cmd appops set com.facebook.app BACKGROUND_IGNORE_BATTERY_OPTIMIZATIONS deny
    ⚠️ Attention: Do not disable background activity for system applications (for example, com.android.systemui). This may lead to unstable operation of the interface.

    4. Updating the system and applications

    Outdated software is one of the main reasons for slowdowns. Manufacturers regularly release updates that: Fix errors in the code (bugs, memory leaks). data-i="147">How to update Android:

    • 🛠️ Fix errors in the code (bugs, memory leaks).
    • ⚡ Optimize the performance of the processor and graphics accelerator.
    • 🔒 Closes security vulnerabilities that can be exploited by viruses.

      • How to update Android:

      1. Go to Settings → System → System update.
      2. Click "Check for updates". If a new version is available, follow the instructions on the screen.
      3. Connect your phone to charging and Wi-Fi - the update may weigh 1-3 GB.

      Updating applications:

      1. Open Google Play Store.
      2. Click on your profile avatar → "Manage applications and device."
      3. Select "Update all" or update apps individually.
      What to do if the system update is not installed?

      If the phone says "Failed to update", try:

      1. Free up at least 3 GB of memory.

      2. Connect to another Wi-Fi (sometimes blocked on the provider's side).

      3. Reset network settings in Settings → System → Reset → Reset Wi-Fi, mobile network and Bluetooth.

      4. Install the update manually via Recovery Mode (requires downloading the firmware from the manufacturer's official website).

      Important: if your phone is older than 3-4 years (for example, Samsung Galaxy S8 or Xiaomi Redmi Note 5), the manufacturer may have stopped supporting updates. In this case, only custom firmware will help (for example, LineageOS), but this is a risky step for beginners.

      5. Resetting the cache and Dalvik-cache

      Caches are temporary files that speed up applications. But over time it accumulates and can, on the contrary, slow down the system. Particularly critical Dalvik-cache is the cache of the Android virtual machine, which is responsible for executing applications.

      How to clear the cache:

      • 📱 Through settings:
        1. Go to Settings → Storage → Cache data.
        2. Click "Clear cache". This will delete temporary files of all applications.
    • 🔧 Through Recovery Mode (deeper cleaning):
      1. Turn off the phone.
      2. Hold down the button combination to enter Recovery (usually Power + Volume up).
      3. Select Wipe cache partition (control - volume buttons, selection - power button).
      4. After cleaning, restart the phone (Reboot system now).

      • To clean Dalvik-cache you will need rights root or custom Recovery (for example, TWRPInstructions:

      1. Log in TWRP Recovery.
      2. Go to Advanced → Wipe Dalvik Cache.
      3. Confirm the action by swiping.
      4. Reboot the phone.
      ⚠️ Attention: Clearing Dalvik-cache may lead to initial slow loading of applications after a reboot - this is normal. The system will restore the cache within 10-15 minutes. use.
      💡

      If after clearing the cache the phone starts to work even worse, try rebooting it 2-3 times in a row. Sometimes the system needs time to restore optimal temporary files.

      6. Checking for viruses and malware

      Viruses and adware can not only steal data, but also loading the processorshow hidden advertisements in the background or mine cryptocurrency. Signs of infection:

      • 📢 The appearance of pop-up advertisements in unexpected places (even on the lock screen).
      • 📱 Unknown applications in the menu (for example, with names like "System Update" or "Flash Player").
      • 🔋 Rapid battery drain and overheating without load.
      • 📶 Increased mobile data traffic (check in Settings → SIM cards and mobile networks → Traffic usage).

      How to check your phone for viruses:

      1. Install an antivirus: Malwarebytes, Bitdefender or Kaspersky Mobile (free versions are quite effective).
      2. Run a full system scan.
      3. Remove all detected threats.
      4. Check the list of installed applications (Settings → Applications) for suspicious apps. Remove everything that you did not install yourself.

      If the antivirus does not find threats, but suspicions remain:

      • 🛡️ Check your phone via VirusTotal (upload a suspicious .apk file to the website).
      • 🔍 Manually look for applications with rights Administrator (Settings → Security → Device administrators). Disable rights for unknown apps.
      • 🚨 Install NetGuard (network activity blocker) and check which applications are using the Internet in the background.
      💡

      The most dangerous viruses for Android in 2026 are disguised as system updates, games or memory cleaning utilities. Never install APK files from unverified sources!

      7. Factory reset (last chance)

      If all the previous methods did not help, all that remains is hard reset —returning the phone to its “out of the box” state. This will delete all data, apps and settings, so:

      • 📲 Make a backup:
        1. Photo/video: Google Photo or copy to PC.
        2. Contacts: synchronization with Google Account (Settings → Accounts → Google → Contact synchronization).
        3. Messages: use SMS Backup & Restore.
        4. Applications: the list of installed apps can be exported via AppBrain or adb backup.
      • 🔐 Make sure you know the login and password for Google Account —after resetting the phone will require authorization (protect FRP).

        • How to reset:

        1. Go to Settings → System → Reset → Factory reset.
        2. Select "Erase all data" (sometimes called "Format").
        3. Confirm the action (you may need to enter a PIN code or pattern).
        4. Wait for the process to complete (5-15 minutes). The phone will reboot.

        If the phone does not respond to commands (stuck on the logo or does not turn on), reset via Recovery Mode:

        1. Turn off the device.
        2. Hold the combination of buttons to enter Recovery (usually Power + Volume up).
        3. Select Wipe data/factory reset (button control volume, select with the power button).
        4. Confirm the action (Yes).
        5. After resetting, select Reboot system now.
        ⚠️ Attention: On some phones (for example, Xiaomi or Realme) after resetting, you may need to link the manufacturer's account. Make sure you remember your login information!

        8. Hardware problems: when is it time to call for service?

        If software methods did not help, the reason for the brakes may be hardware. Common hardware problems:

        Malfunction Symptoms Solution
        Worn out battery Phone turns off at 20-30% charge, quickly discharges, heats up Battery replacement (cost: 1,500–5,000 ₽ depending on the model)
        CPU overheating The phone heats up even when idle, slows down when load Cleaning dust, replacing thermal paste (in the service)
        Damaged memory (eMMC/UF) Frequent read/write errors, applications crash, files are damaged Replacement memory chips (expensive, often cheaper to buy a new phone)
        Oxidation of contacts Lags after moisture, unstable operation of modules (camera, speaker) Cleaning with alcohol in a service center

        How to check the hardware condition:

        • 🔋 Battery: Install AccuBattery and check for wear (Battery health in the application). If the value is below 80%, it's time to change the battery.
        • 🌡️ Temperature: Use CPU Monitor or AIDA64to monitor processor heating. Normal: up to 40°C at idle, up to 60-70°C under load.
        • 💾 Memory: Run the test at AIDA64 (Tests → Memory). If the read/write speed is below 100 MB/s, there are problems with the drive.

        If you suspect a hardware fault:

        1. Check the phone for physical damage (cracks, swollen battery).
        2. Take it to a service center for diagnostics. Average cost of inspection: 500–1,500 ₽.
        3. If repairs are too expensive (for example, replacing the motherboard), consider buying a new phone.
        ⚠️ Attention: Do not try to disassemble the phone yourself unless you have experience! Modern smartphones have fragile cables and adhesive connections - careless repairs can lead to complete failure of the device.

        FAQ: Frequently asked questions about lags on Android

        ❓ Why did the phone start to lag after updating Android?

        Updates sometimes contain bugs, especially on older or less common models. Manufacturers optimize firmware primarily for flagships. Solutions:

        1. Wait for the patch (usually released within 1-2 months).
        2. Roll back to the previous version of Android (requires unlocking the bootloader and custom one Recovery).
        3. Install custom firmware (for example, LineageOS), if official support has been discontinued.
        ❓ Is it possible to speed up an old phone (for example, Samsung Galaxy S7 or Xiaomi Redmi 4)?

        Yes, but with reservations:

        • 📱 Install light firmware (for example, LineageOS without Google Apps).
        • 🚀 Use light alternatives standard applications:
          • Browser: Bromite or Firefox Lite.
          • Launcher: Nova Launcher or Lawnchair.
          • Keyboard: AnySoftKeyboard or FlorisBoard.
        • ⚡ Disable animation: in Developer settings (Settings → About phone → Build number — tap 7 times) set:
          • Window animation → 0.5x or off
          • Transition animation → 0.5x or off
          • Animator duration → 0.5x or off

        Radical way: buy a phone with Android Go (for example, Nokia 1.4 or Samsung Galaxy A03 Core) - they are optimized for weak hardware.

        ❓ Why do games lag even on a powerful phone?

        Causes of slowdowns in games:

        • 🔥 Throttling: the processor reduces the frequency due to overheating. Solution: clean the phone from dust, replace the thermal paste.
        • 📶 Background activity: other applications are consuming resources. Solution: activate Do Not Disturb mode or use Game Booster (built-in MIUI, ColorOS etc.).
        • 🎮 Unoptimized game: some games (for example Genshin Impact) do not work well on processors Mediatek. Solution: lower the graphics settings in the game menu.
        • 🔋 Power saving mode: limits performance. Solution: disable it in Settings → Battery.

        Check the FPS in the game using GameBench or the built-in counter (available in some games, for example PUBG Mobile). Normal: 30 FPS for medium settings, 60 FPS for flagships.

        ❓ How to check which application is using the processor?

        Use built-in tools or third-party utilities:

        1. Android Settings:
          1. Go in Settings → Battery → Battery Usage.
          2. Click on the graph and select "CPU Usage".
          3. See which applications are consuming the most resources.
        2. Application Side:
          • AIDA64: tab System → CPU load.
          • CPU Monitor: shows real-time load with graphs.
          • Simple System Monitor: widget for the status bar.
        3. ADB (for advanced): 
          adb shell top -m 10 -t

          The command will show the top 10 processes by CPU load.

        If you see an unknown process with a high load (for example, com.android.abc.xyz), look for its name on Google - it could be a virus.

        ❓ Lags due to the telecom operator - how to check?

        A poor connection can cause delays, especially in online games or instant messengers. Check:

        1. Run a speed test in Speedtest or nPerf. Normal:
          • 4G: ≥ 20 Mbit/s (download), ≤ 100 ms (ping).
          • 5G: ≥ 100 Mbit/s, ≤ 50 ms.
      • Check the signal level in Settings → SIM cards and mobile networks → Signal strength (or in the status line). If ≤ 2 bars, the connection is unstable.
      • Check whether the operator's network is overloaded: ask friends with the same operator or look at reviews in Twitter/Telegram.

      Solutions:

      • 📶 Switch to another band (for example, from 4G to 3G, if 4G is unstable).
      • 🔄 Turn on Airplane mode to 30 seconds, then disconnect - this will reset the connection.
      • 📡 Try another SIM card (the problem may be in your SIM card).
      • 🏠 If the signal at home is bad, set Wi-Fi Calling (Settings → SIM cards → Wi-Fi calls).