Your Android smartphone suddenly stopped responding to touches, applications open for 10 seconds, and the system “thinks” after each click? Freezes are one of the most common problems on devices running Android, but the reasons can vary dramatically. In some cases, it is enough to clear the cache, and sometimes an in-depth diagnosis of hardware faults is required.

In this article we will look at why the phone starts to slow down or completely freezes - from software failures to physical damage. You will learn how to diagnose the problem yourself, what tools to use to clean the system, and when to contact a service center. We will pay special attention 12 key reasons, due to which the phone begins to slow down or completely “freezes” - from software glitches to physical damage. You will learn how to diagnose the problem yourself, what tools to use to clean the system, and when to contact a service center. We will pay special attention hidden processes that “eat up” smartphone resources in the background- they are often overlooked even by experienced users.

The material is relevant for all versions Android (from Android 8 Oreo to Android 15) and brands: Samsung Galaxy, Xiaomi Redmi/POCO, Honor, Realme, Oppo and others. If your phone has become glitchy after an update, installation of a new application or a mechanical shock, here you will find a solution.

1. RAM overload

The most obvious and common cause of freezes is lack of RAM. Modern applications (especially games, social networks and instant messengers) consume more and more RAM, and if there is not enough of it, the system begins to freeze when switching between tasks.

How to check? Open Settings → Device care → Memory (the path may differ depending on the shell). If there is less free RAM 20% of the total volume, this is a critical indicator. For example, on a smartphone with 4 GB RAM free there should be at least 800–1000 MB.

  • 📱 Close background applications manually through the "Recent applications" menu (swipe up and hold).
  • 🔄 Reboot phone every 1-2 days - this clears RAM of "garbage" processes.
  • ⚙️ Disable autorun unnecessary applications in the settings (Settings → Applications → Autorun).
  • 🚫 Delete “heavy” gamesthat take up >1 GB in RAM (for example, Genshin Impact, PUBG Mobile).
⚠️ Attention: On some smartphones (for example, Xiaomi with a shell MIUI), the system aggressively “kills” background processes to save money. RAMThis can lead to freezes when returning to the application. Solution: disable it. the “Memory optimization” function in the developer settings (Settings → About phone → Build number - tap 7 times to unlock).
📊 How often do you reboot smartphone?
Once a day
Once a week
Only when it freezes
Never

2. Full storage (internal memory)

When the internal memory of a smartphone is full to capacity, the system begins to slow down even during simple operations. Critical threshold - less than 10% of free space. For example, on a phone with 128 GB there should be at least 12–15 GB free space.

The problem gets worse if you use cheap smartphones with memory eMMC (instead of UFS). Such drives suffer greatly in speed when filled above 80%. You can check the memory type through applications like AIDA64 or DevCheck.

Memory type Read/write speed Does it slow down when full?
UFS 3.1 ~2100/1200 MB/s No (up to 95% full)
UFS 2.1 ~850/250 MB/s Yes (over 90%)
eMMC 5.1 ~250/125 MB/s Yes (over 80%)
  • 🗑️ Clear application cache v Settings → Storage → Data cache.
  • 📸 Transfer photos/videos to the cloud (Google Photos, Yandex Disk) or to a memory card.
  • 🎮 Delete unused games —they take up tens of gigabytes.
  • 🔍 Find “junk” files using Files by Google or CCleaner.
💡

If the phone slows down when recording video in 4K, try lowering the resolution to 1080p —this will reduce the memory load.

3. Malfunctions of the firmware (Android OS)

Unstable firmware is one of the most insidious causes of freezes. Failures may occur after:

  • 🔄 OS updates (especially on beta versions).
  • ⚡ Incorrect rooting or installing custom firmware.
  • 📱 Reset settings with errors.

How to diagnose? If the phone hangs on the logo when turned onreboots into bootloop (cyclic reboot) or produces errors like "Android System WebView has stopped" the firmware is to blame.

Solutions:

  1. Reset the settings to factory settings (Settings → System → Reset). Attention: all data will be deleted!
  2. Reflash the phone via Odin (for Samsung), Fastboot (for Xiaomi/Google) or SP Flash Tool (for Mediatek).
  3. Roll back to the old version of Androidif crashes started after the update.
⚠️ Attention: On some models Samsung (for example, Galaxy S22 s One UI 6) after resetting the settings, you may need to re-authorize in Google with the password for the account that was linked earlier. If you do not remember it, access to the phone will be blocked!
How to enter Recovery mode on Xiaomi?

1. Turn off the phone.

2. Press Power button + Volume up for 10 seconds.

3. In the Recovery menu, select Wipe Data to reset or Reboot to reboot.

4. Viruses and malware

Malware can not only steal data, but also load the processor, causing freezes. Especially at risk are users who:

  • 📲 Install applications from unofficial sources (outside Google Play).
  • 🔗 Click on suspicious links in WhatsApp/Telegram.
  • 🎮 Download “hacked” games (APK + OBB).

Signs of infection:

  • 🔋 Rapid battery drain even in standby mode.
  • 📶 Suspicious traffic (check in Settings → SIM cards and mobile networks → Traffic usage).
  • 🚨 Appearance of unfamiliar applications in the menu.

How to treat:

  1. Install an antivirus (Malwarebytes, Dr.Web Lightand scan the system.
  2. Remove suspicious applications manually.
  3. Enable Google Play Protect (Settings → Security → Google Play Protect).
  4. If a virus blocks access to the settings - boot into Safe Mode (hold the power button → long tap on “Turn off” → “Security Mode”).
💡

Even official applications from Google Play may contain advertising modules that load the system. Always read reviews before installation!

5. Overheating of the processor

Overheating is one of the main reasons for sudden freezes and shutdowns. The normal operating temperature of the processor is 30–45°C. If it exceeds 60°C, the system starts. data-i="189">(forced reduction in performance), which leads to lags. throttling (forced reduction in performance), which leads to lags.

Causes of overheating:

  • 🎮 Long gaming sessions (especially in Call of Duty Mobile, Genshin Impact).
  • ☀️ Direct sunlight or heat (>30°C outside).
  • 🔋 Faulty battery (swelling, wear).
  • 📱 Closed caseblocking ventilation.

How to check the temperature:

  1. Install AIDA64 or CPU Monitor.
  2. Open the tab Sensors (Sensors).
  3. If the temperature CPU > 60°C - urgently cool down the phone.
⚠️ Attention: On smartphones with processors Snapdragon 8 Gen 1/2 (for example, Samsung Galaxy S22 Ultra, Xiaomi 12 Pro), overheating is a known problem due to unoptimized power consumption. Manufacturers release patches, but a radical solution is to replace the thermal paste (requires disassembling the device).

Disconnect charging|Close all applications|Remove the case|Put the phone in the shade|Do not use it for 15-20 minutes-->

6. Application conflicts

Sometimes cause freezes conflicts between applications, especially if they use the same system resources. For example:

  • 📱 Two antivirus scan the system at the same time.
  • 🎵 Two music players trying to play audio.
  • 📡 Two VPN client active simultaneously.

How to find “culprit”:

  1. Boot into Safe Mode (without third-party applications). If the phone works fine, the problem is in one of the installed applications.
  2. Uninstall recently installed apps one by one, checking stability.
  3. Use Android Debug Bridge (ADB) to analyze logs: 
    adb logcat | grep -i "error\|crash"

Top 5 conflicting applications (according to data Reddit and 4PDA):

  1. Facebook and Facebook Lite (simultaneously).
  2. Clean Master / DU Speed Booster (aggressive optimization).
  3. Truecaller + another caller ID.
  4. Google Chrome + Opera (WebView conflicts).
  5. Xiaomi’s Security App + third-party antivirus.

7. Hardware faults

If software methods do not help, the reason may lie in physical breakdown. Common hardware problems:

Malfunction Symptoms Solution
Battery wear Sudden shutdowns at 30–40% charge, swelling of the case Battery replacement (cost: 1500–5000 ₽)
Damage to the motherboard Random reboots, lack of response to charging Diagnostics in the service (repair or replacement possible)
Malfunction of the SIM card slot Freezes during calls, loss of network Cleaning contacts or replacing the slot
Problems with the display/touchscreen "Ghost" touches, non-working screen areas Replacing the sensor or cable

How to check hardware problems:

  • 🔋 Check the battery status in AccuBattery (if the capacity has dropped below 80% —it’s time to change).
  • 🛠️ Pass equipment test through #0# (on Samsung) or Phone Tester.
  • 🔍 Inspect the case for battery swelling (if the screen is “raised” - this is a dangerous sign!).
⚠️ Attention: If the phone is dropped into water or subjected to strong vibration (for example, in a car without shock absorption), microcracks on the circuit board may appear months later in the form of random freezes. In such cases, only professional diagnostics with soldering equipment will help.

8. Outdated software

If you have not updated Android applications for a long time, this may cause compatibility conflicts and slowdowns. Manufacturers regularly release patches for:

  • 🛡️ Vulnerability fixes (for example, Dirty Pipe, Stagefright).
  • ⚡ Performance optimizations (especially for processors Mediatek and Exynos).
  • 📱 Support for new functions (for example Android 14 for Samsung One UI 6).

How to update:

  1. Check for OS updates: Settings → Update Software.
  2. Update all applications in Google Play.
  3. If the update is stuck, download the firmware manually from the brand's official website and flash it through Odin/Fastboot.

Important: On some budget smartphones (for example, Redmi 9A, Samsung Galaxy A10) manufacturers they stop supporting updates after 2-3 years. In this case, only flashing to a custom OS will help (for example, LineageOS).

💡

Do not update the OS through third-party sites - this can lead to IMEI blocking or bricking of the phone!

FAQ: Frequently asked questions about Android freezes

My phone freezes only in games. What's wrong?

Most likely the problem is insufficient productivity or overheatingCheck:

  1. CPU temperature (AIDA64).
  2. Free RAM (close background applications).
  3. Graphics settings in the game (lower the resolution to HD and disable anti-aliasing).

If the game is Genshin Impact or PUBG Mobile —they require at least 6 GB RAM i processor level Snapdragon 730/Mediatek Helio G90T.

The phone freezes when connected to Wi-Fi. What to do?

Possible reasons:

  • 📶 Unstable router (reboot it).
  • 🔒 Conflict IP addresses (try manually setting the IP in the Wi-Fi settings).
  • 🛡️ VPN or firewall blocks the connection.
  • 📱 Failure in the Wi-Fi module (check in Safe Mode).

Solution: Forget the network (Settings → Wi-Fi → [network] → Delete) and connect again.

After updating Android, the phone began to slow down. How to roll back?

A rollback is possible, but requires data reset. Instructions:

  1. Download the old firmware from the manufacturer's website (for example, SamFW for Samsung).
  2. Install Odin (for Samsung) or Fastboot (for Xiaomi/Google).
  3. Flash the phone in the mode Download Mode (for Samsung) or Fastboot.

⚠️ Warning: Rolling back may block Google Pay other services due to resetting security keys.

The phone freezes while charging. Is this dangerous?

Yes, it is critical symptom! Possible reasons:

  • 🔋 Faulty battery (risk of swelling or fire!).
  • ⚡ Bad cable/charging (use original or certified one USB-C).
  • 📱 Power controller failure (needs repair).

Immediately turn off the charging and check the phone at a service center!

Is it possible to speed up the old one? Android smartphone?

Yes, but with reservations:

  • ✅ Install lightweight firmware (LineageOS, HavocOS).
  • ✅ Use lightweight applications (Facebook Lite, Twitter Lite).
  • ✅ Disable animation in the developer settings (Settings → About phone → Build number — tap 7 times, then Animation scale = Off).
  • ❌ Does not help on phones with 1–2 GB RAM and Android 5–7 —here is only a replacement.