Cleaning Android RAM: a complete guide to speeding up your smartphone

Has your Android smartphone started to slow down, applications close spontaneously, and the interface animation twitches? In 90% of cases it is to blame overloaded random access memory (RAM). Even on flagships with 12 GB of RAM, background processes, caches, and “garbage” tasks accumulate over time, which the system cannot manage correctly. But clearing RAM isn't just a matter of clicking a button in the task manager. Incorrect actions can lead to the opposite effect: Android will begin to aggressively reload applications, using up battery power and processor resources.

In this guide we will look working methods for clearing RAM from standard tools to hidden developer functions that do not require root access. You'll learn why popular "RAM boosters" often wreak havoc on your system, how to determine the real cause of the lag (spoiler: it's not always the RAM), and what settings can help prevent clogs from happening again. All methods have been tested on Samsung Galaxy S23 Ultra, Xiaomi Redmi Note 12, Google Pixel 7 and other devices with Android 12–14.

Why Android “eats” RAM and when it really needs to be cleaned

Android uses dynamic memory management: system It decides which processes to leave in RAM and which to unload. It is normal that after several hours of work there are 20+ tasks hanging in memory - this is how the caching mechanism works to speed up the re-opening of applications. Problems begin when:

• 📱 Less than 10% of free RAM remains (checked in the developer settings).
• 🐢 Applications visually freeze when switching (for example, Telegram or Chrome reboot when returning to them).
• 🔄 The system begins "kill" background tasks more aggressive than usual (music is interrupted, notifications are not come).
• 🔋 The battery drains faster due to constant rebooting of processes.

It is important to understand: cleaning RAM will not speed up the phone if the brakes are caused by a weak processor, overheating or lack of permanent memory (ROM). For example, on Samsung Galaxy A10 with 2 GB of RAM, even after cleaning, lags will appear when launching heavy games. In such cases, only optimizing startup or resetting to factory settings will help.

⚠️ Attention: If after cleaning the RAM the phone begins to work even worse, it means you have deleted critical system processes. You can restore them only by rebooting the device.

Method 1: Built-in task manager - when it works and when it is useless

The most obvious method is to use the standard application manager. However, it only cleans user processes, without affecting system services. How to use it correctly:

1. Open recent applications (swipe up from the bottom panel or the "□" button).
2. Click on the icon 🗑️ "Close all" (on some firmware - "Clear").
3. For selective cleaning, swipe left/right on the card of the unnecessary application.

On firmware MIUI (Xiaomi), ColorOS (Oppo/Realme) and One UI (Samsung) task manager is expanded. For example, in MIUI there is a button "Block" - it fixes the application in memory, preventing it from being unloaded. This is useful for instant messengers or music players, but abuse of locking leads to shortages. RAM for new tasks.

⚠️ Attention: On some custom firmware (for example LineageOS), the task manager may be absent. In this case, use ADB or third-party commands open source utilities.

Close all unnecessary applications|Do not block tasks unnecessarily|Reboot your phone after cleaning|Check free RAM in Developer Settings-->

Method 2: Developer Settings - hidden tools for the advanced

Android hides powerful management tools memory in the menu for developers. To activate it:

1. Go to Settings → About phone.
2. Find the item "Number assembly" and tap on it 7 times.
3. Return to the main settings menu - a new section will appear "For developers".

Key options are now available:

• 🔄 "Do not save actions" - force closes all processes when exiting the application. Not recommended enable constantly: this will break Android operating logic.
• 📊 "Process limit" - limits the number of background tasks. Optimal value: "Standard limit" or "Maximum 4 processes".
• 🚫 "Stop all". processes" - similar to "Close all", but kills all tasks, including system ones. Use only in extreme cases!
• 🔍 "Services in operation" —shows which applications are actively using RAM. Here you can manually stop suspicious processes.

For example, if in the list of services you saw com.android.systemui with consumption 500+ MB, this may indicate a memory leak in the shell. In this case, only rebooting or resetting the cache via Recovery will help.

Method 3: Cleaning application cache - indirect release of RAM

The application cache does not directly occupy RAM, but its overflow forces Android to reload tasks more often, which indirectly increases the load on RAMclearing the cache helps in cases where:

• 📸 Applications (for example, Instagram or TikTok) begin to "lag" when scrolling.
• 🎮 Games (Genshin Impact, PUBG Mobile) take a long time to load or crash.
• 📱 The phone is heating up for no apparent reason.

How to clear the cache correctly:

1. Go to Settings → Applications.
2. Select an application (for example, Facebook) and tap "Storage".
3. Click "Clear cache" (do not confuse with "Clear data" - this will delete accounts and settings!).

For mass clearing:

1. Use a file manager (for example, Files by Google).
2. Go to Device memory → Android → data.
3. Delete folders with cache (names like com.facebook.katana).

⚠️ Attention: Do not clear the cache of system applications (for example, com.android.phone or com.google.android.gsf) - this may disrupt the operation of the phone.

Method 4: Disabling startup and background activity

Many applications start when the system starts and hang in RAM, even if you do not use them. For example, AliExpress, Wildberries or Yandex.Music can consume up to 200 MB of RAM in the background. How to fix this:

For standard Android (Pixel, Motorola, Nokia):

1. Go to Settings → Applications.
2. Select an application (for example, VK) and tap "Battery".
3. Activate "Limit background activity".

For Samsung (One UI):

1. Open Settings → Device care → Battery.
2. Tap "Background restriction" and add applications to the list.

For Xiaomi (MIUI):

1. Go to Settings → Applications → Autorun management.
2. Disable autoloading for unnecessary apps.

List of applications that can be safely limit:

• 🛒 Marketplaces (Ozon, AliExpress, Amazon).
• 🎵 Music services (except for what you use daily).
• 📰 News aggregators (Yandex.News, Google News).
• 🎮 Games that you play less than once a week.

Method 5: Using ADB commands for deep cleaning (without root)

If standard methods do not help, you can manually kill processes via Android Debug Bridge (ADB)This does not require root access, but you need to enable USB debugging:

1. Activate the developer menu (see Method 2).
2. Enable "USB debugging" in the developer settings.
3. Connect your phone to the PC and install ADB drivers.
4. Open Command Prompt (Windows) or Terminal (macOS/Linux) and type:

adb devices

(The name of your device should appear.)

Now you can use commands to manage memory:

Example: to close Facebook, find its PID command adb shell ps -A | grep facebook, and then execute adb shell kill [PID].

⚠️ Attention: Do not kill processes named system_server, zygote or surfaceflinger —this will crash the interface and reboot.

adb shell ps -A > processes.txt

Method 6: Factory reset is a last resort

If all the previous methods did not help, and the phone continues to slow down, the reason may be system junkaccumulated after updating or deleting applications. In this case, it will help hard reset (resetting to factory settings). will remove:

• 📱 All installed applications and their data.
• 📁 System settings (Wi-Fi, Bluetooth, accounts).
• 🔑 Passwords and encryption keys.

How to reset correctly:

1. Create a backup copy of important data (photos, contacts, messages).
2. Go to Settings → System → Reset settings.
3. Select "Delete all data (reset to factory settings)".
4. Confirm the action and wait for the reboot.

On some devices (for example Samsung) there is an option "Reset to factory settings with deleting data from the internal memory" —it clears both /dataand /sdcard. If you do not want to lose photos, select the option without formatting the internal storage.

⚠️ Attention: After the reset, the phone may work slower than usual for the first 1-2 days - this is normal. Android optimizes the system for your habits (for example, learning which applications you launch more often).

Method 7: Alternative methods (with caution!)

If you are willing to take risks, you can try non-standard ones. solutions. But remember: they can break the stability of the system or lead to data loss.

• 🔧 Changing a file build.prop: some users increase the setting ro.config.max_starting_bgto limit background processes. Requires root or a patched boot image.
• 📦 Installing a custom kernel: kernels like FrancoKernel or ElementalX optimize memory management, but their firmware requires an unlocked bootloader.
• 🔄 Using Xposed modules: module Greenify allows you to “freeze” applications, but only works on Android 7–9.

Change example build.prop (only for advanced users!):

1. Download BuildProp Editor from Play Market.
2. Find the parameter ro.config.max_starting_bg.
3. Change the value from 8 to 4 (will limit background processes).
4. Reboot your phone.

⚠️ Attention: Incorrect editing build.prop can lead to bootloop (cyclic reboot). Before making changes, make a backup copy of the file!

Frequently asked questions about cleaning RAM on Android