Samsung phone slows down and lags: what to do to speed up Android in 2026

Has Samsung Galaxy begun to open applications slowly, freezes when scrolling, or suddenly “thinks” for a few seconds? Such symptoms are familiar to most smartphone owners Android after 1–2 years of use. The reasons for the brakes can lie both in system loadand in hardware problems - from a worn out battery to overheating of the processor.

In this article we will analyze 12 proven ways to speed up Samsungstarting with basic actions (clearing the cache, disabling background processes) and ending with deep optimization (resetting to factory settings, disabling animation through the developer). All methods were tested on models Galaxy S22/S23, Galaxy A54/A73 and Galaxy M34, but are also suitable for older devices (starting with Android 10).

We will pay special attention hidden settingsthat are not written about in standard instructions - for example, how limit the operation of unnecessary services Samsung Knox or disable energy-consuming functions One UI. You will also learn when brakes are a sign hardware malfunctions, and what to do in such cases.

1. Diagnostics: why Samsung slows down

Before you start optimizing, it is important to understand source of the problem. Brakes on Samsung are divided into three categories:

• 📱 Software - clogged memory, conflicting applications, outdated firmware.
• 🔋 Hardware - worn out battery, overheating of the processor, damaged flash memory.
• 🤖 System - errors One UI, malfunctions Google Services or Samsung Knox.

To identify "weak point", perform a quick check:

1. Open Settings → Device care → Diagnostics (on some models the path: Settings → Device maintenance → Battery → Diagnostics).
2. Check the "Memory", "Battery" and "Security"sections. If there are warnings in either of them (for example, "Memory almost full" or "Battery worn out"), the problem is obvious.
3. Run the built-in test performance: Settings → Device care → Three dots (⋮) → Performance test.

If the test shows low results for CPU or storage, most likely, the hardware is to blame. If there are problems with RAM or background processes , software optimization will help.

⚠️ Attention: On models Galaxy S20 and older (with processors Exynos 990/2100/2200) the brakes may be due to overheating due to a weak cooling system. Check the temperature in the application CPU Monitor —if it exceeds 45°C when idlethe thermal paste needs to be cleaned or replaced.

2. Clearing cache and garbage: a quick way to free up memory

The most common cause of slowdowns is clogged cache applications and system processes. On Samsung the cache is cleared manually or automatically through built-in tools.

First, delete unnecessary files:

• 🗑️ Go to Settings → Device care → Memory.
• 🔍 Click "Clear" in the section "Unnecessary files" (temporary data, duplicates and remnants of deleted applications are collected here).
• 📂 In the "Other files" section, check the folders Download, DCIM i Pictures —gigabytes of unnecessary media files often accumulate there.

Next, clear the cache of individual applications:

1. Open Settings → Applications.
2. Select the application that is slowing down (for example, Facebook, Instagram or Google Play Services).
3. Click "Storage" → "Clear cache" (do not confuse with "Clear data" —this will delete all application settings!).

For deep cleaning, use modes "Optimization" and "Deep cleaning" v Settings → Device care. These functions automatically close background processes and remove garbage.

⚠️ Attention: Do not clear the system application cache Samsung Experience Service, Samsung Push Service or Android System WebView - this may lead to malfunctions One UI.

3. RAM optimization: how to close background processes

Samsung is known for aggressively managing RAM (RAM), but sometimes even the built-in mechanisms fail. If the phone starts to “lag” when switching between applications, it means that the RAM is overloaded.

Here's how to free up memory:

• 🔄 Use the built-in "Optimizer" RAM": Settings → Device care → Memory → Optimize now.
• ⚙️ Disable autorun of unnecessary applications: Settings → Applications → Three dots (⋮) → Autorun and deactivate apps that should not run in the background (for example, games or instant messengers that you rarely use use).
• 🚫 Prohibit background activity: in the settings of each application (Settings → Applications → [name] → Battery) select "Limit background activity".

For advanced users there is a way force limit background processes via Developer mode:

1. Activate developer mode: Settings → About phone → Software information → Build number (press 7 times).
2. Go back to Settings → Developer mode.
3. Find parameters:
   • "Background limit processes" — set "Maximum 2 processes".
   • "Do not save actions" — enable (this will force applications to restart each time they are opened, but will save RAM).

These settings will significantly reduce the load on RAM, but may lead to due to the fact that some applications will longer to load on the first launch.

4. Disabling animations and visual effects

One UI from Samsung is known for its beautiful animations, but they slow down the work on weak or loaded devices. Disabling visual effects can speed up the interface by 20–30%.

This can only be done through Developer mode:

1. Activate developer mode (see instructions in the previous section).
2. Go to Settings → Developer Mode and find three parameters:
   • "Window animation scale" - install "Without animation".
   • "Transition animation scale" — set "Without animation".
   • "Animation duration" — set "Off".

After applying the changes, the interface will become less smooth, but much faster. This is especially noticeable when:

• Opening/closing applications.
• Switching between windows.
• Scrolling long lists (for example, in Settings or Galaxy Store).

If you don't like the complete absence of animations, set the value «0.5x» - this will reduce delays, but maintain visual smoothness.

Parameter	Default value	Recommended value	Effect
Window animation scale	1x	No animation / 0.5x	Speeds up opening/closing applications
Transition animation scale	1x	No animation / 0.5x	Remove delays when changing screens
Animation duration	1x	Off	Maximum interface acceleration
Background processes limit	Standard limit	Maximum 2 processes	Reduces the load on RAM

5. Firmware update and rollback to factory. version

Outdated firmware is one of the main reasons for slowdowns. Samsung regularly releases updates that optimize operation One UI and fix errors. Check the relevance of your version:

1. Go to Settings → Software update.
2. Click "Download and install".
3. If the update is available, connect to Wi-Fi and wait for completion (do not interrupt process!).

If after updating the brakes increasedthe new firmware version may contain bugs. In this case, it will help rolling back to the factory firmware or resetting the settings.

How to reset the settings to factory settings:

• 🔄 Soft reset (saves files, but deletes settings and applications): Settings → General → Reset → Reset settings.
• 🧹 Hard reset (complete removal of all data): Settings → General → Reset → Delete all data.

Before resetting be sure to make a backup copy via Settings → Accounts and archiving → Backup and recovery or Samsung Cloud.

⚠️ Attention: On some models (Galaxy S20 FE, Galaxy A51after a reset, you may need to re-authorize in Google and Samsung Account. If you have forgotten your password, restore it in advance!

What to do if the update is stuck?

If the firmware is stuck during the installation stage (for example, on the logo Samsung more than 30 minutes), force restart the phone, holding Power button + Volume Down for 10–15 seconds. If this does not help, you will need firmware via Odin (only for advanced users!).

6. Checking the battery and cooling

A worn-out battery or overheating are common causes of sudden brakes. If your phone starts to lag when charging or playing games, check:

• 🔋 Battery status: Settings → Device care → Battery → Battery status. If the capacity drops below 80%, the battery requires replacement.
• 🌡️ CPU temperature: use the application CPU Monitor or AIDA64. Normal temperature at idle is 30–35°C, under load - up to 45°C. If the values ​​are higher, cleaning from dust or replacing the thermal paste is required.
• 🔌 Charger: non-original charges can cause overheating and slowdowns. Use only certified accessories Samsung.

If the battery is worn out, replacing it will solve the problem sudden freezes (especially on models Galaxy S10 and older). On new phones (Galaxy S23, Galaxy A54), the battery lasts longer, but still loses capacity after 300–500 charging cycles.

To check the temperature without third-party applications:

1. Enter in the phone dialer code: #0#.
2. Select «Sensor Test» (may be called «Temperature» on some models).
3. View indicators «Battery Temp» and «CPU Temp».

7. Disabling unnecessary functions One UI

One UI from Samsung is overloaded with functions, many of which work in the background and eat up resources. Disabling unnecessary services can free up to 1–2 GB of RAM and reduce the load on the processor.

Which functions can be safely disabled:

• 📡 5G (if not used): Settings → Connections → Mobile networks → Network mode → LTE/3G/2G.
• 📍 Wi-Fi Scanning i Bluetooth Scanning (constantly scan networks in the background): Settings → Connections → Advanced → Wi-Fi/Bluetooth scanning.
• 🎮 Game Launcher and Game Optimizing Service (if you don’t play): Settings → Applications → Game Launcher → Disable.
• 🔊 Bixby (voice assistant that consumes RAM): Settings → Additional features → Bixby → Disable.
• 📱 Double tap to launch camera (if not are using): Settings → Additional features → Double tap → Off.

It is also recommended to disable Auto-updating applications v Galaxy Store i Google Play, since it can start at the most inconvenient moment and slow down the system.

For maximum optimization:

1. Go to Settings → Accounts and archiving → Archiving and recovery.
2. Disable "Auto-sync" for unnecessary accounts (for example, Samsung Cloudif you do not use it).

8. When the brakes are a malfunction

If none of the methods helped, perhaps the problem is hardware. Here are the signs that the phone requires repair:

• 🛠️ Brakes appear even after resetting to factory settings.
• 💥 Phone spontaneously reboots or turns off.
• 🔥 Case gets very hot without load (for example, in standby mode).
• 📉 Performance dropped sharply after being dropped or exposed to moisture.
• 💾 Internal memory damaged (files disappear, applications are not installed).

What could have failed:

Component	Signs of malfunction	Solution
Battery	Sudden shutdowns, brakes at 20–30% charge	Battery replacement
Flash memory (eMMC/UFS)	Errors when writing files, applications crash	Replacing a memory chip or phone
Processor (overheating)	Brakes at the slightest load, temperature >50°C	Cleaning dust, replacing thermal paste
Random access memory (RAM)	Constant reboots, application errors	Diagnostics at the service center

If you suspect a malfunction do not try to repair the phone yourself (especially if it is under warranty). Contact an official service center Samsung or a trusted repair center.

⚠️ Attention: On models with Exynosprocessors (for example Galaxy S21 for the European market), the brakes may be associated chipset degradation due to overheating. In this case, only replacing the motherboard will help.

FAQ: Frequently asked questions about brakes on Samsung

🔹 Why does Samsung start to slow down after an update?

Updates One UI sometimes contain bugs, especially on older models (Galaxy S9, Galaxy A50). If after the update the phone became slower:

1. Clear the cache via Settings → Device care → Memory → Clear.
2. Disable animations (see section 4).
3. If that doesn’t help, reset the settings (section 5).

As a last resort, you can roll back to the previous firmware version via Odin, but this is risky for beginners.

🔹 How to speed up Samsung with 4 GB of RAM?

On phones c 4 GB of RAM (Galaxy A51, Galaxy M31) critically important:

• Disable background activity of unnecessary applications.
• Use "Lite Mode" (Settings → Device care → Three dots (⋮) → Settings → Light mode).
• Install Lite versions applications (for example, Facebook Lite, Messenger Lite).

It will also help memory expansion via microSD (if supported) with the function Adoptable Storage.

🔹 Why is the camera slow on Samsung?

Camera lags are usually associated with:

• CPU overload (close all background applications before shooting).
• Crash in the Camera application (clear the cache: Settings → Applications → Camera → Storage → Clear cache).
• Low memory (free up at least 5 GB on the internal storage).

If the problem persists, try resetting the camera to factory settings or using a third-party application (for example GCam).

🔹 Is it possible to speed up Samsung using root?

Yes, but this risky and voids the warranty. With root access you can:

• Delete system applications (Bixby, Samsung Knox).
• Use cores to overclock the processor (for example, Exynos Tuner).
• Disable unnecessary services Google Play.

However, incorrect actions can lead to "briku" (breakage) of the phone. If you are a beginner, it is better to do without root.

🔹 How to check if a virus is slowing down your phone?

Viruses rarely cause slowdowns, but it’s worth checking:

1. Install Malwarebytes or Dr.Web Light and scan the system.
2. Check the list of installed applications for suspicious ones (Settings → Applications).
3. If you find unfamiliar apps, remove them and reset the settings.

Also brakes may cause advertising SDK in free games. Try to remove the latest installed applications.