Why the Android phone is slow: a complete analysis of the reasons and solutions

Did your smartphone suddenly start to “stutter” when scrolling through your social media feed, applications take a long time to open, and animations jerk like a slide show? This is not always a sign of an aging device. Even flagship models Samsung Galaxy S23 Ultra or Google Pixel 8 Pro can slow down due to software glitches, overloaded memory or hidden processes. In 80% of cases, the problem can be solved without visiting a service center - just know where to look for bottlenecks.

In this article we will analyze all possible reasons for the brakes from banal overheating to hidden viruses in the firmware, and also give step-by-step guide how to diagnose and eliminate each of them. We will pay special attention new "chips" Android 14-15 that can quietly eat up resourcesto common mistakes made by users when trying to “optimize” the system. If after reading you understand that the problem is hardware, at the end there is a checklist for choosing a service center.

1. Overheating of the processor: why the phone “strangles” itself

Modern smartphones on Snapdragon 8 Gen 3 or Dimensity 9300 are capable of accelerating to 3.3 GHz, but at the same time they heat up like irons. When the chipset temperature exceeds 50–55°C, Android automatically throttlet (limit) performance to avoid damage. As a result, the interface begins to “slow down”, games lag, and the camera may refuse to turn on at all.

How to check:

• 🔥 Install the application AIDA64 or CPU Monitor —they will show the real processor temperature time.
• 📊 In Settings → Battery → Battery status (on some firmware) see the heating graph.
• ☀️ Try working with your smartphone in the shade or in an air-conditioned room - if the brakes disappeared, overheating is to blame.

Main causes of overheating:

Cause	How to fix
Games/applications with high load	Limit FPS in the game settings or use Game Booster (on Xiaomi/Redmi).
Charging + active use	Do not play or shoot 4K video while charging - this accelerates battery wear.
Poor heat dissipation (dust, case)	Remove the cover, blow out the connectors with compressed air. On some models (for example ROG Phone 7), replacing the thermal paste helps.
Failure of the processor cores	Reboot the phone or reset the settings Settings → System → Reset settings (without deleting data).

⚠️ Attention: If the phone heats up even in standby mode (for example, at night), this may indicate hardware failure a short circuit on the motherboard or a swollen battery. In this case turn off the device immediately contact service.

2. Full memory: when 128 GB is not enough

Android needs free space not only to install applications, but also for cache, temporary files and background work ZRAM (virtual RAM). If there is less 10-15% of free spaceon the device, the system begins to "glitch": applications crash, photos are not saved, and the interface freezes for 2-3 seconds.

How to clear memory correctly:

Hidden “memory eaters”:

• 📁 Google maps cache (Google Maps, Waze) - can take up to 5–10 GB Cleared in Settings → Applications → Google → Storage.
• 🎮 Game data (Genshin Impact, Call of Duty Mobile) - some games download up to 20 GB of additional files.
• 📥 Undeleted updates - after updating Android, a folder with temporary files (/cache) may not be cleared. It will help to reboot into Recovery Mode (hold Power + Volume up when turning on) and select Wipe Cache Partition.

3. Viruses and malware: how they steal resources

Counterfeit applications, fake APK files and even some “fraudulent” launchers may contain mining scriptsspyware or ad bots. Such apps run in the background, consuming up to 30–40% CPU and sending data to remote servers. Signs of infection: Mining scripts and Internet → Data transfer

• 🔋 The battery runs out in 3-4 hours without active use.
• 📶 mobile data traffic is consumed at night (check in Settings → Network and Internet → Data transfer).
• 🤖 Unknown applications appear (for example, com.system.update or Android Services Library).

How to check and remove:

1. Download Malwarebytes or Kaspersky Mobile Antivirus and run a deep scan.
2. Check administrator rights: Settings → Security → Device administratorsUninstall suspicious apps.
3. Enable Google Play Protect: Play Store → Profile → Play Protect → Scan.
4. If the virus is not removed, reset the phone to factory settings (Settings → System → Reset).

⚠️ Attention: Some viruses are disguised as system processes (for example, com.android.phone). Before deleting, check the name of the process in Google so as not to delete a critical Android component.

How to recognize a fake application in the Play Market?

Pay attention to:

- Number of downloads (popular applications have millions).

- Date of the last update (if a year ago - suspicious).

- Reviews (many of the same 5-star reviews with errors - a sign of cheating).

- Permissions (for example, a flashlight should not request access to SMS).

4. Failures in the firmware: when Android is “buggy” by itself

OS updates do not always go smoothly. For example, after updating to Android 15 users Samsung Galaxy S22 massively complained about interface freezes due to bugs in the new memory management mechanism (Memory Management Daemon). Even minor security updates can conflict with custom shells (One UI, MIUI, ColorOS).

Signs of a software failure:

• 🔄 The phone spontaneously reboots 1-2 times a day.
• ⚙️ Settings are reset (for example, wallpaper or alarm sound).
• 🖥️ The interface “twitches” when scrolling (especially noticeable on AMOLED screens).

Solutions:

1. Update rollback (if the brakes start after the update):

   adb shell pm uninstall -k --user 0 com.android.updater

   Then manually install the previous firmware version via Odin (for Samsung) or Fastboot (for Pixel).

2. Clearing the cache system:

   - Turn off the phone.

   - Press Power + Volume up to enter Recovery Mode.

   - Select Wipe Cache Partition.

3. Reset to factory settings (if others methods did not help). First make a backup via Google Drive or Smart Switch (for Samsung).

5. Lack of RAM: why 8 GB of RAM is not always enough

Android actively uses caching: the more free RAM, the faster applications run. But some processes (for example Google Services or Facebook) can “eat up” up to 1–1.5 GB of memory in the background, leaving only crumbs for other tasks. If you 4–6 GB of RAM, slowdowns when multitasking are inevitable.

How to optimize RAM:

• 🧹 Close unused applications via Recent tasks (swipe up).
• ⚡ Disable autorun of unnecessary apps: Settings → Applications → Autorun (on Xiaomi) or Settings → Battery → Optimization (on Samsung).
• 🔄 Use light version applications: Facebook Lite, Messenger Lite, Twitter Lite.
• 🛠️ On some firmware (for example, ColorOS on Oppo/Realme) there is a built-in function Extension RAM —it uses part of the internal memory as virtual RAM.

For advanced users:

adb shell settings put global settings_enable_monitor_phoenix true

This command enables hidden monitoring of RAM usage in Android 12+. After completing it, the item Settings → System → Developer . Application conflicts: when apps “fight” for resources Memory Usage Monitor.

6 will appear in

Some applications do not get along well with each other. For example:

• 🔒 Antiviruses (Avast, 360 Security) can block system processes, considering them malicious.
• 🎵 Music players (Spotify, YouTube Music) conflict with smooth playback if running in the background Google Assistant.
• 📱 Launchers (Nova Launcher, Microsoft Launcher) can slow down animations if at the same time active Bixby (on Samsung) or Google Discover.

How to find the “culprit”:

1. Run Settings → Developer → Process statistics (if there is no item, turn it on Developer modeby clicking 7 times on Build number in Settings → About phone).
2. See which applications are consuming the most CPU over the last hour.
3. Uninstall suspicious apps one by one, checking performance.

⚠️ Attention: Do not disable system processes manually via Settings → Applications → Show system ones. This may lead to bootloop (loop reboot) or loss of functionality (for example, the camera or mobile network will fail).

7. the hardware is to blame

If all software methods have been tried, but the phone still slows down, the problem may lie in physical wear of the components:

• 🔋 Worn out battery (capacity below 70%) - the power controller begins to limit performance.
• 💾 Damaged flash memory (bad blocks) - the phone “thinks” when reading/writing files.
• 📶 Faulty communication module - if the smartphone constantly loses the network, the process com.android.phone loads the CPU to 100%.
• 🖥️ Chipset detachment (on old phones) - due to overheating, the solder cracks and contact with the processor is lost.

Diagnostics:

Symptom	Probable cause	Solution
The phone turns off at 20–30% charge	Battery wear	Battery replacement (cost: 1,500–5,000 ₽).
Applications crash when opening photos/videos	Bad blocks in flash memory	Diagnostics via DiskDigest or replacing the drive.
The network indicator is constantly blinking	Faulty 4G/5G module	Resoldering or replacing the module (in the service).
The phone heats up even when turned off	Short circuit on the board	Urgent diagnostics in the service!

To check the battery, use the application AccuBattery —it will show the actual capacity and degree of wear. If the value Health is below 80%, it’s time to change the battery.

8. Incorrect settings: when the user himself slows down the phone

Many of the “optimizations” that are recommended on the Internet are actually harm performance. Common errors:

• ❌ Disable animations through Settings developer - this does not speed up work, but only makes the interface less responsive.
• ❌ Using “boosters” (Clean Master, DU Speed Booster) - they themselves consume resources and often contain adware.
• ❌ Limiting background processes - leads to applications constantly rebooting, wasting more CPU.
• ❌ Installing custom kernels without knowledge of the features - can cause overheating or unstable operation.

What really works:

• ✅ Enable Adaptive brightness i Adaptive battery in the settings - this will reduce the load on the processor.
• ✅ Use dark topic on AMOLED screens - saves up to 15% charge and reduces heating.
• ✅ Disable Wi-Fi Scanning and Bluetooth Scanning v Settings → Location → Scanning —these functions constantly poll the network.

FAQ: Answers to frequently asked questions

My phone only slows down in games. What's the matter?

Most likely it is enabled performance limiter (on some firmware it is called Game Optimizer or Power Saving Mode). Go to the game settings and select the mode Maximum performance or High FPS.

Also check the processor temperature - if it is above 60°C, the game will lag due to throttling. Try lowering the graphics settings or using a cooling pad.

After updating Android, the phone began to slow down. What to do?

First, clear the system cache via Recovery Mode (instructions above). If it doesn't help:

1. Check if Adaptive battery mode is turned on - it may limit background processes.
2. Disable Animation of transitions in Developer settings (set scale Animation without scaling at 0.5x).
3. If the brakes started after a major update (for example, from Android 13 to 14) - wait 1-2 days. The system can index files in the background.

The phone slows down when scrolling through the feed on social networks. How to fix it?

The culprit is heavy web views (built-in browsers) in applications. Solutions: heavy web views mode

• IN Instagram or Facebook enable the option Lite mode (if any).
• Use Chrome with flag chrome://flags/#enable-lite-mode (enable Lite Mode).
• Disable autoplay of videos in the social network settings.

Is it worth resetting the phone to factory settings settings?

This last resort, but it helps in 90% of cases of software brakes. Before resetting:

1. Make a backup via Google Assistant (Settings → Google → Backup).
2. Remember logins/passwords for your accounts (they will not be saved).
3. Make sure you have access to mail linked to Google Account — after To reset, the phone will require confirmation.

The reset is performed in Settings → System → Reset. On some phones (for example, Xiaomi) there is an option Reset without deleting files —it saves photos and videos.

How to choose a service center for diagnostics?

If you suspect a hardware fault, contact only authorized service centers (the list is on the manufacturer's website). Check: Authorized service centers (replacing the battery should take no more than 1-2 hours).

• 🔧 Availability of original spare parts (ask for a certificate).
• 💰 Cost of diagnostics (in good services it is free or included in the repair).
• ⏱️ Repair time (battery replacement should take no more than 1-2 hours).
• 📄 Warranty on work (minimum 6 months).

Avoid “garage” workshops - they often use non-original parts (for example, batteries without a temperature controller), which can lead to a fire.