Even new smartphones on Android over time begin to slow down: applications take a long time to open, animations twitch, and the system responds to touches with a delay. In 80% of cases, the problem is solved using software methods - without contacting a service center. But in order to choose the right method, you must first understand the cause of the brakes.

Lags can occur due to overloaded memory, application conflicts, outdated firmware or even hardware faults. In this article we will analyze all possible causes of slowdowns on Android (including rare cases when it is not the phone itself that is to blame, but the network settings or Google account) and give step-by-step guide for eliminating each. From simple actions like clearing the cache to complex manipulations with the firmware, you will find a solution regardless of the device model.

1. Diagnostics: how to determine the cause of the brakes

Before proceeding with optimization, you need to identify the “weak point” of the system. Brakes may be due to:

  • 📱 Lack of RAM (RAM) - the phone begins to freeze when multitasking.
  • 🗃️ Overflowing storage - less than 10% of free space on the internal memory leads to lags.
  • 🔄 Background processes —some applications load the processor even when minimized.
  • 🛠️ Outdated firmware or errors in it.
  • 🔋 Battery problems —a worn-out battery can cause sudden drops in performance.

To check system boot:

  1. Open Settings → System → About phone → Android version and tap 7 times on the build number to activate developer mode.
  2. Go back to Settings → System → For developers and find the section Process statistics (or Memory usage). This displays how many resources each application consumes.
  3. Pay attention to the column Free memory —if the value is less than 500 MB, the system is running at its limit.
📊 What most often slows down on your phone?
Applications (social networks, instant messengers)
Games
System interface (menu, animation)
Camera and gallery
Calls and SMS

If in the list of processes you see unknown services with high CPU consumption (for example, com.android.phonesty or android.process.media), this may indicate on virus or conflict of system components. In this case, resetting to factory settings or flashing the firmware will help.

⚠️ Attention: On some models Xiaomi, Realme i Oppo built-in "optimizers" (for example, Security or Game Space) themselves can cause lags. Try disabling them in the battery settings.

2. Clearing cache and unnecessary data

Application cache and system temporary files accumulate over time and take up gigabytes of memory. Cleaning them is the fastest way to restore your phone's performance.

2.1. Clearing the cache of individual applications

If a specific application is slow (for example, Instagram or Google Chrome):

  1. Go to Settings → Applications → All applications.
  2. Select the problematic application → Storage → Clear cache.
  3. If there is a button Manage space, click it and delete unnecessary files (for example, downloaded media in messengers).

2.2. Clearing the system cache

To delete the entire system cache:

  1. Turn off the phone.
  2. Hold down the button combination to enter Recovery Mode (usually Power + Volume up, but on some models Samsung you need to hold down Power + Volume up + Bixby).
  3. In the recovery menu, select Wipe cache partition (controlled by the volume and power buttons).
  4. After cleaning, reboot the device.

Delete the cache of frequently used applications (social networks, browsers)

Clear the system cache via Recovery Mode

Delete downloaded files from the Download folder

Check the DCIM folder for duplicate photos and videos

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On phones with Android 12+ there is a built-in function Cleaning storage (Settings → Storage → ClearIt automatically finds unnecessary files, including:

  • 📁 Temporary application files.
  • 🎬 Unused downloads.
  • 🗑️ Files in the trash.
  • 📸 Duplicate photos and screenshots.
⚠️ Attention: Do not confuse Clear cache and Clear data! The second action will delete all application settings (including logins and saves), and you will have to configure it again.

3. Optimizing random access memory (RAM)

Lack of RAM is one of the main causes of lags. When RAM is full, Android begins to forcefully close background processes, which leads to a jerky interface and long loading times for applications.

3.1. Limiting background processes

To reduce the load on RAM:

  1. Activate Developer mode (as described in section 1).
  2. Go to Settings → System → For developers.
  3. Find the parameter Limit processes and select Maximum 2 processes in the background (or No background processesif the phone is very weak).

3.2. Disabling unnecessary applications

Many pre-installed applications (bloatware) run in the background and load the system. To disable them:

  1. Go to Settings → Applications.
  2. Tap on the three dots in the upper right corner and select Show system ones.
  3. Find unnecessary services (for example, Google Play Music, Bixby on Samsung, HiCare on Huawei) and click Disable.

Some firmwares (for example MIUI or ColorOS) have built-in tools for optimization RAM:

  • 🔄 Settings → Battery → Performance mode (select High performance).
  • 🚀 Settings → Accessibility → System acceleration (enable the option).
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If errors appear after disabling system applications (for example, Bluetooth stopped working), return them to their original state through the same section Applications → Restore

3.3 Using the paging file. (swap)

On weak phones (with 2–3 GB RAM) you can create virtual memory on the memory card. To do this:

  1. Install the application SwapFile or ROEHSOFT RAM-EXPANDER from Google Play.
  2. Insert a high-speed memory card (class UHS-I or higher).
  3. In the application, select the size of the swap file (recommended 1-2 GB) and activate it.

This will not replace physical RAM, but it will help avoid sudden freezes when multitasking.

RAM volume Recommended background process limit Is it necessary to clear the cache Is it worth using swap
2 GB Maximum 1 process Weekly Yes (1–1.5 GB)
3–4 GB Maximum 2 processes Once every 2 weeks Optional (512 MB–1 GB)
6 GB and above Standard settings Once per month No

4. Updating the firmware and kernel

Outdated firmware not only deprives you of new functions, but may also contain errors that cause slowdowns. Manufacturers regularly release updates for:

  • 🛠️ Fixes errors in the kernel Linux (for example, memory leaks).
  • 🔒 Closing security vulnerabilities that can be exploited by viruses.
  • 🎯 Optimizations working with specific chipsets (for example Snapdragon 8 Gen 2 or Mediatek Dimensity).

To update Android:

  1. Go to Settings → System → System update.
  2. Click Check for updates.
  3. If a new version is available, download it (preferably via Wi-Fi) and install it.
What to do if the update is not installed?

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

1. Free up at least 3 GB of memory.

2. Connect to another Wi-Fi (sometimes blocking the corporate network interferes with downloading).

3. Reset network settings (Settings → System → Reset → Reset the mobile network).

4. Install the update manually via Recovery Mode (you need the firmware file from the manufacturer's official website).

If your phone no longer receives updates from the manufacturer (for example, Samsung Galaxy S8 or Xiaomi Redmi Note 5), you can consider custom firmware like LineageOS or Pixel Experience. They often work faster than stock ones due to the optimized kernel and the absence of bloatware.

⚠️ Attention: Installing custom firmware requires unlocking the bootloader and may void the warranty on some models (for example Huawei or Honor) this also blocks access to banking applications due to lack of certification Google Mobile Services.

5. Setting up animation and interface

Visual effects Android (smooth transitions, application opening animation) look beautiful, but consume resources. Disabling or speeding up animation can significantly speed up the performance of weaker devices.

To change the animation speed:

  1. Activate Developer mode (see section 1).
  2. Go in Settings → System → For developers.
  3. Find the parameters:
    • Window animation scale — set 0.5x or Off
    • Transition animation scale —set 0.5x or Off
    • Animator Duration Scale —set 0.5x or Off

You can also turn off unnecessary visual effects:

  • 🌓 Switch to dark theme (Settings → Display → Dark theme) - it reduces the load on the GPU.
  • 🔍 Disable live wallpaper and animated widgets.
  • 📱 In the launcher (for example, Nova Launcher) disable Application animation and Shadow icons.
💡

Disabling animation will not speed up the loading of heavy applications (for example, games), but will make navigating the menu and switching between tasks instant.

On phones with Android 10+ there is a hidden function Force GPU Rendering (Settings → For developers → Force GPU processing). Enabling it can speed up the rendering of the interface, but on weak chipsets (for example, Snapdragon 4xx) sometimes leads to the opposite effect - check the performance before and after.

6. Battery and overheating problems

A worn-out battery or overheating can cause throttling a forced reduction in processor performance to save power or prevent damage. This manifests itself as sudden freezes, even if the phone is not loaded.

6.1. Checking the battery condition

To find out the degree of battery wear:

  1. Install the application AccuBattery or Battery Guru.
  2. Charge the phone to 100% and discharge to 0% without turning off the application.
  3. Look at the parameter Battery health:
    • 🟢 80–100% - the battery is in good condition.
    • 🟡 60–80% - a noticeable decrease in capacity, lags are possible under high load.
    • 🔴 Below 60% - replacement is required.

6.2. Fighting overheating

If the phone heats up and starts to slow down:

  • 🧊 Remove the case (especially silicone) - it can block the heat sink.
  • 🔌 Do not use the phone while charging for resource-intensive tasks (games, video editing).
  • 🌡️ Disable Fast charging in the battery settings (if any).
  • 📶 In hot weather, avoid direct sunlight and do not leave the phone in machine.

On some models (for example, Samsung Galaxy S or OnePlus) there is a hidden Thermal limitafter which the processor automatically reduces the frequency. To reset it:

  1. Turn off the phone.
  2. Put it in a cool place (but not in the refrigerator!) for 10-15 minutes.
  3. Turn it on and check performance.
⚠️ Attention: If the phone overheats even when idle (for example, when watching a video), this may indicate battery or thermal paste malfunction. In this case, diagnostics are required at a service center.

7. Radical methods: reset and flashing

If none of the above helped, radical measures remain: reset to factory settings or flashing. These methods will return the phone to its “pristine” state, but will require data backup.

7.1. Hard Reset

Reset deletes all user data, but retains the current firmware. How to do:

  1. Create a backup copy of important files (photos, contacts, messages).
  2. Go to Settings → System → Reset → Delete all data.
  3. Confirm the action and wait reboot.

After the reset, the phone will be like new - without unnecessary applications and garbage in the memory.

7.2. Flashing via Fastboot

If the problem is in damaged firmware, you can reinstall it manually:

  1. Download the official firmware for your model from the manufacturer's website (for example, Xiaomi — miui.com, Samsung — sammobile.com).
  2. Install on PC ADB and Fastboot (instructions available on XDA Developers).
  3. Connect the phone to the computer in Fastboot (hold Power + Volume down when turned on).
  4. Run the command: 
    fastboot flash system system.img

    fastboot flash boot boot.img
    

    fastboot reboot

For phones Samsung with processors Exynos you can use the app Odin, and for Mediatek — SP Flash Tool. Detailed guides are available on thematic forums (for example, 4PDA or XDA).

💡

Reflashing is a last resort. If you are not confident in your skills, it is better to contact a service center. Incorrect actions can turn the phone into a “brick.”

8. Hardware solutions: when software methods do not help

If the phone slows down even after resetting and flashing, the problem may be in hardware:

  • 🔋 Worn out battery —with a capacity below 60%, the processor operates in a limited mode.
  • 💾 Damaged flash memory — bad sectors slow down reading/writing data.
  • 🔌 Faulty charging connector —can cause voltage surges and malfunctions of the chipset.
  • 🌡️ Failure of memory chips — a common problem after falls or overheating.

How to diagnose hardware faults:

  1. Memory test: Install Memory Test or AIDA64 and check the read/write speed if it is lower. 100 MB/s, the flash memory may be failing.
  2. Battery test: As described in section 6, use AccuBattery.
  3. Checking chips: Shine a flashlight on the motherboard (with the phone disassembled) - blackened or swollen elements indicate overheating.

If a hardware fault is detected, solutions:

Problem Repair cost (approximately) Is it worth repairing
Replacing the battery 1 500–3 000 ₽ Yes (cheaper than a new phone)
Resoldering flash memory 3 000–8 000 ₽ Only for expensive models
Replacing the charging connector 1 000–2 500 ₽ Yes
CPU/memory failure 5 000–15 000 ₽ No (cheaper to buy a new phone)
⚠️ Attention: If the phone is older than 4-5 years (for example, Samsung Galaxy S7 or Xiaomi Redmi 4X), repairs may turn out to be unprofitable. In this case, it is more logical to consider purchasing a new device, taking into account modern performance requirements.

FAQ: Frequently asked questions about brakes on Android

❓ Why did the phone start to slow down after updating Android?

Updates sometimes contain optimization errors for specific models. Try:

  1. Clear the system cache via Recovery Mode.
  2. Roll back to the previous firmware version (if a backup is available).
  3. Wait 1-2 days - sometimes the system itself optimizes operation after the update.

If lags remain, write in support of the manufacturer, indicating the model and firmware version.

❓ Is it possible to speed up the phone using booster applications?

Applications like Clean Master or CCleaner often make things worse:

  • They close aggressively background processes, which leads to re-downloading applications when returning to them.
  • They can delete useful system files.
  • They work in the background and load the system.

It is better to use built-in optimization tools (for example, Settings → Memory → Clear).

❓ Why do games slow down even though the phone is powerful?

The reasons may be different:

  • Throttling - processor reduces the frequency due to overheating (check the temperature in AIDA64).
  • Background processes - close all applications before playing.
  • Graphics settings —in some games (for example, Genshin Impact or PUBG), you need to manually reduce the quality of textures.
  • Driver updates helps —on phones with chipsets Mediatek sometimes updating GPU drivers through ARM Mali GPU User Space Drivers.
❓ How to transfer applications to a memory card to free up space?

Starting from Android 6.0 there is a function Adoptable Storage, but it does not work on all phones. Alternative methods:

  1. Use the memory card as internal storage (Settings → Memory → SD card → Configure as internal memory). Attention: after this the card cannot be removed without losing data!
  2. Transfer application data manually (for example, game cache) through a file manager.
  3. Install applications that support transfer to SD (for example, Spotify or Netflix allow you to save media files to map).
❓ Why does the phone slow down when connected to Wi-Fi or a mobile network?

The problem may be related to:

  • DNS servers — try changing them to 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google).
  • Background synchronization — disable auto-update of applications in Google Play and photo synchronization in Google Photos.
  • VPN or proxy —some applications (for example, 1.1.1.1 or Orbot) may conflict with network settings.
  • Problems on operator side - if the brakes are only on the mobile network, contact your provider's support.