Why Android thinks for a long time: reasons and ways to speed up

You click on the application icon, and the smartphone freezes for a few seconds. Or you are trying to switch between tasks, but the system “thinks” before each action. Is this a familiar situation? Android slowdown is one of the most common problems faced by users 1-2 years after purchasing a device. But the reasons for this behavior can be very different: from a banal lack of memory to serious failures in the firmware.

In this article we will analyze 10 main reasonswhy Android begins to “think” before executing commands, and offer practical solutions for each of them. It is important to understand that the hardware part of the smartphone is not always to blame - often the problem lies in the software or even in your usage habits. We will not advise “buying a new phone” (although for some cases this is really the solution), but will focus on methods that will help restore performance without drastic measures.

Before you start diagnosing, answer one question: the slowdown is manifested constantly or only in certain situations (for example, when launching games or working with the camera)? This will help narrow down the range of possible causes.

1. Overloaded random access memory (RAM)

Random access memory (RAM) is the “home screen” of your smartphone, where data from active applications is temporarily stored. When there is not enough memory, Android begins Forcibly close background processes or freezes trying to free up resources. This is especially noticeable on devices with 2–4 GB RAMwhich today are considered outdated, but are still common.

How to check RAM load?

• 📱 Open Settings → Device → Memory (the path may differ depending on the shell).
• 📊 Pay attention to the RAM usage graph. If there is less free space, this is a critical indicator. 20% - this is a critical indicator.
• 🔍 See which applications consume the most RAM. Messengers (Telegram, WhatsApp), social networks (TikTok, Instagram) and games are often to blame.

What to do?

• 🧹 Close unused ones applications manually through the recent tasks menu (swipe up on most smartphones).
• ⚙️ Disable autorun unnecessary apps in the settings (path: Settings → Applications → Autorun).
• 📉 Use “light” versions of applications (for example, Facebook Lite, Messenger Lite).
• 🔄 If all else fails - restart your smartphone. This clears RAM and temporary files.

⚠️ Attention: Forcibly closing system processes (for example, Android System or Google Play Services) through the task manager may lead to the unstable work device. Do not do this unless absolutely necessary.

2. Full storage (internal memory)

When the internal memory of a smartphone is full to capacity, Android starts to work slower for two reasons:

1. Not enough cache space —systems and applications cannot create temporary files to speed up work.
2. Data fragmentation —files are “scattered” across memory, and the system takes more time to search for them.

Filling memory on 90% or moreis considered critical. You can check this in Settings → Storage. Pay attention not only to the total volume, but also to the distribution:

• 📁 System files (usually occupied by 10–15 GB).
• 🎵 Media (photos, videos, music).
• 📦 Applications and their data (cache, downloads, updates).
• 🗑️ Garb (residual files after uninstalling apps, temporary data).

How to free up space?

Method	Efficiency	Risks
Removing unnecessary applications	⭐⭐⭐⭐	You can accidentally delete important software
Clearing the cache manually (Settings → Applications → Storage → Clear cache)	⭐⭐⭐	You will have to re-download the data (for example, in games)
Transfer files to an SD card or cloud	⭐⭐⭐⭐	Not all applications support working with SD
Use built-in cleaning tools (for example, Files by Google)	⭐⭐	Can delete desired files (check before confirming)
Reset to factory settings	⭐⭐⭐⭐⭐	All data is deleted (backup is required)

What are “junk files” and how to find them?

Junk files are residual data that remains after uninstalling applications, temporary download files, image thumbnail caches, etc. You can find them using applications. like CCleaner or SD Maid, but be careful: some of them can delete important system files. It is better to use built-in tools, for example, MIUI (for Xiaomi) there is a "Cleaning" section in the settings.

3. Outdated version of Android or firmware

Manufacturers regularly release updates for Android that not only add new features, but also optimizing the operation of the systemIf your smartphone has not been updated for a long time, it may slow down due to:

• 🐛 Uncorrected errors in the old version firmware.
• 🔒 Security vulnerabilitiesthat slow down work due to background checks.
• 📉 Incompatibilities with new versions of applications.

How to check for updates?

1. Go to Settings → System → System update.
2. Click Check for updates.
3. If an update is available — install ithaving previously charged the smartphone to 50% or more.

What to do if there are no updates?

• 🔍 Check if it's running out official support your model. For example, smartphones Samsung receive updates longer (up to 4 years), and budget models Nokia or Alcatel only 1-2 years.
• 🛠️ Install custom firmware (for example, LineageOS), but this requires unlocking the bootloader and may void the warranty.
• 📱 Consider buying a new device if the current one is outdated (for example, Released before 2019 with 2 GB RAM).

⚠️ Attention: Firmware update via ODIN (for Samsung) or Fastboot (for Xiaomi, Google Pixel) may lead to bricking (total inoperability) of the device if you interrupt the process or use the wrong version of the software. Do this only if you are confident in your actions.

4. data-i="162">Many applications continue to run in the background, even when you are not using them. These are:

Many apps continue to run in the background even when you're not using them. This:

• 📧 Mail and instant messengers (continuously checking for new emails/messages).
• 📍 Geolocation services (Google Maps, Yandex.Navigator).
• ☁️ Cloud storage (Google Drive, Dropbox, OneDrive).
• 🔄 Auto-updating applications v Google Play.

How to reduce the load?

Disable auto-sync for unnecessary ones accounts|Limit background activity of applications|Disable geolocation for applications that do not need it|Set a limit on mobile traffic for background tasks|Disable auto-update of applications

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More details about each item:

1. Auto-sync: go to Settings → Accounts and disable synchronization for unnecessary services (for example Google Photosif you do not use backup).
2. Background activity: in the settings of each application (Settings → Applications → [name] → Battery) select Limit background activity.
3. Geolocation: open Settings → Privacy → Permissions → Geodata and disable access for applications that it not needed (for example, Facebook or TikTok).
4. Mobile traffic: in Settings → Network and Internet → Data transfer → Background mode limit using the mobile data for background tasks.

Pay special attention Google Play Services - this system process often consumes a lot of resources. constantly “hangs” in the top lines for battery or RAM consumption, try:

• Clear cache (Settings → Applications → Google Play Services → Storage → Clear cache).
• Update via Google Play (if available).
• Disable auto-update for Google Play Services (but this may interfere with other applications).

5. Viruses and malware

Android is an open system, which makes it vulnerable to viruses, especially if you install applications from unofficial sources (APK files). Malicious software can:

• 🕵️‍♂️ Spy trace your clicks, read messages). data-i="207">or redirect to phishing sites.
• 💰 Show advertisements on or redirect to phishing sites.
• 🐢 Slow down work devices, consuming resources in the background.

Signs of infection:

• 📱 The smartphone installs unknown applications on its own.
• 🔋 The battery drains quickly even in standby mode.
• 🌐 Pop-up windows with advertisements appear outside the browser.
• 📈 Inexplicable increase in Internet traffic consumption.

How to check and remove viruses?

1. Install an antivirus (for example, Malwarebytes, Bitdefender or Kaspersky) and perform a full scan.
2. Check the list of installed applications (Settings → Applications) for suspicious apps (for example, with names like System Update, Flash Player or unreadable characters).
3. Remove unknown applications and clear the browser cache (Chrome, Firefox etc.).
4. If the virus is not removed, run reset to factory settings (do not forget to backup important data!).

⚠️ Attention: Some “antiviruses” from Google Play are themselves malware. Install only proven applications with high ratings and a large number of reviews. For example, Malwarebytes has a reputation as a reliable tool.

Important: Viruses are often disguised as system applications (for example, Android System WebView or Google Play Protect). Before deleting, check the name on the Internet - real system files cannot be deleted!

6. Battery problems and overheating

If your smartphone heating during use or quickly discharges, this may be due to:

• 🔋 Wear battery (capacity drops over time).
• 🔥 CPU overheating due to high load or malfunction.
• ⚡ Faulty power controller (rare, but it does occur).

How to check the battery status?

• Use applications like AccuBattery or ##4636## (engineering menu, path: Battery information).
• Pay attention to battery life. If the smartphone is discharged in 2-3 hours without active use, this is a sign wear.
• Check case temperatureThe norm is up to 40–45°C under load. If higher, it is overheating.

Solutions:

• 🔋 If the battery capacity has dropped below 70% from the original - replace it (in a service center or yourself, if you have experience).
• 🧊 Avoid overheating:
  • Do not use your smartphone in the sun or near heat sources.
  • Remove the case while charging or intensive work.
  • Close background applications if playing heavy games games.
• ⚡ Check charger. Non-original or damaged cables/power supplies may cause overheating.

If the smartphone turns off when the charge level is low (for example, when 20–30%), this is a sign of severe battery wear or a calibration failure. Try to calibrate the battery:

1. Charge your smartphone until 100%.
2. Disconnect from charging and use until completely discharged (until it turns off).
3. Charge again until 100% without interruptions.
4. Repeat the cycle 2-3 times.

7. Failures in the firmware or kernel

Sometimes Android starts to “think” due to software failuresthat are not related to viruses or lack of memory. This could be:

• 🔄 Failed update (interrupted or with errors).
• 🛠️ Damage to system files (for example, after rooting).
• 🤖 Shell conflict (for example MIUI, One UI, ColorOS with some applications).

Signs of a software failure:

• 📱 Smartphone spontaneously reboots.
• 🖥️ The interface “lags” even after a reboot.
• ⚙️ Some settings are not saved.
• 🔴 Errors like “The application has stopped” appear.

Solutions:

• 🔄 Reset to factory settings (make a backup first!).
• 📥 Flashing via official utilities (for example, Samsung Smart Switch, Xiaomi Mi Flash).
• 🛠️ If the smartphone is rooted, check the integrity boot.img and system via TWRP.
• 🔍 Use ADB to diagnose logs:

  adb logcat | grep -i "error\|warning"

  (this will show critical errors in the system).

⚠️ Attention: If you are not sure of your actions, do not try to reflash the smartphone yourselfcontact the service center - incorrect firmware can turn the device into a “brick.”

8. Hardware faults

If all software methods have been tried, but the smartphone is still slow, the problem may lie in hardware.

• 💾 Damaged flash memory (for example, due to falls or overheating).
• 🖥️ Faulty processor or chipset (rare, but possible with physical damage).
• 📶 Problems with the antenna or communication module (if the brakes are related to the mobile data or Wi-Fi).

How to diagnose?

• 🔧 Use tests like CPU Throttling Test (checks processor performance) or AIDA64 (memory diagnostics).
• 📊 Check memory read/write speed via AndroBench. Norm for eMMC 5.1 — 200–300 MB/s, for UFS 2.1 — 600–800 MB/s. If the values are significantly lower, the memory is worn out.
• 🔍 Inspect your smartphone for presence physical damage (swollen battery, traces of falls, moisture).

Solutions:

• 🛠️ Replacing flash memory (not possible on all models).
• 🔧 Repair or replacement of the motherboard (expensive, but sometimes justified for flagships).
• 📱 If repair is impractical, consider buying a new device.

Example of diagnostics via AIDA64:

1. Install the application from Google Play.
2. Go to section Tests.
3. Select Memory test and run the test.
4. Compare the results with the reference ones for your models (can be found on forums like 4PDA or XDA-Developers).

FAQ: Frequently asked questions about Android slowdown

My smartphone began to slow down after updating Android. What to do?

Updates sometimes contain errors, especially on older devices. Try:

1. Clear the system cache (Settings → Storage → Clear cache).
2. Roll back to the previous firmware version (if there is a backup).
3. Reset settings to factory settings (latest option).

If the problem is widespread, the manufacturer may release a patch. Follow the news on the official website.

Will replacing the battery help speed up the smartphone?

Only if the brakes are related to overheating or unstable power supply. A new battery alone will not speed up the processor or memory. However, if the old battery is swollen and putting pressure on the motherboard, replacing it can restore normal performance.

What applications slow down Android the most?

Top 5 "resource-intensive" applications (according to Android Authority, 2026):

1. Facebook and Facebook Messenger (constant background activity).
2. TikTok (aggressive cache and tracking).
3. Snapchat (poor optimization for Android).
4. Uber and Yandex.Taxi (continuous geolocation tracking).
5. Games like Genshin Impact or PUBG Mobile (high load on GPU/CPU).

Solution: use “light” versions (Lite) or limit background activity.

Is it possible to speed up an old smartphone with 2 GB RAM?

Yes, but with reservations:

• 📵 Install custom firmware (for example, LineageOS without Google Apps).
• 🚫 Remove all unnecessary applications, including system ones (root required).
• 🔄 Use cloud services (for example, Google Photo to store photos/videos).
• 🎯 Disable interface animation (Settings for developers → Animation scale = Off.).

However, do not expect miracles - modern applications will work with lags. 2 GB RAM modern applications will run with lags.

Why does the smartphone slow down only in games?

Probable reasons:

• 🎮 Weak processor/video chip (for example, Mali-G52 in budget smartphones).
• 🔥 Throttling (automatic decrease in performance due to overheating).
• ⚙️ Incorrect graphics settings in the game (too high resolution or FPS).
• 📶 Background processes, consuming resources (for example, Discord or Twitch).

Solutions:

• Close all background applications before playing.
• Low graphic settings in the game.
• Use Game Booster (built-in MIUI, One UI etc.).
• If all else fails, the game is not optimized for your device.