Did your smartphone suddenly start to slow down, reboot spontaneously, or produce errors? Such symptoms can appear on both budget Android suddenly started to slow down, reboot spontaneously, or generate errors? Such symptoms can appear both on budget Xiaomi Redmiand flagships Samsung Galaxy S23. The reasons range from simple overheating to serious firmware failures. In 80% of cases, the problem can be solved on your own - without contacting a service center.

In this article we will examine 10 proven methodshow to diagnose and fix problems without losing personal data. You will learn when it is enough to clear the cache, and when a full reset is required, how to distinguish a software failure from a hardware defect, and what tools Android will help bring your phone back to life. Let's start with the simplest solutions - perhaps your case will not require radical measures.

1. Reboot is the first step to recovery

If the phone starts slow down, does not respond to touches or gives errors when launching applications, start with a classic reboot. This method works in 30-40% of cases, as it clears RAM and terminates frozen processes.

How to reboot correctly:

  • 🔄 Soft reboot: hold down the power button and select “Restart” (if the screen is responsive).
  • 🔋 Forced reboot: hold down the power button + volume up for 10-15 seconds (if the phone is completely frozen).
  • 📱 For phones with a non-removable battery: the combination may differ (for example, on Sony Xperia - power + volume down).

After the reboot, check whether the glitches persist. If the problem disappears, most likely the culprit was a temporary glitch RAM or a conflict in background processes. If the phone starts to slow down again after 5-10 minutes, proceed to the next step.

📊 How often does your Android phone require a reboot?
Once a week
Once a month
Only after updates
I never reboot

2. Checking free space and clearing garbage

One ​​of the most common sources of glitches is lack of memory. When there is less than 10% free space left on the device, Android it starts to slow down and applications crash. This is especially true for phones with 32-64 GB of internal memory.

How to free up space:

  • 🗑️ Delete the application cache: Settings → Storage → Cache data (on Samsung the path may differ).
  • 📸 Transfer photos/videos to the cloud (Google Photos, Yandex Disk) or to PC.
  • 🎮 Delete unused games - they take up to 2-5 GB each.
  • 🔍 Use the built-in storage analyzer: Settings → Storage → Free up space.
Type files Average size Can I delete
Application cache 500 MB - 3 GB Yes (safe)
Downloaded files (APK, PDF) 100 MB - 1 GB Yes (check important documents)
Remains of deleted applications 200-800 MB Yes (use Files by Google)
System updates (cache) 1-2 GB Yes, but do not delete update files manually!

Critical point: if less than 1 GB is free, the phone will crash even after clearing the cache. It is optimal to maintain 10-15% of free space of the total volume. memory.

3. Software updates

Manufacturers regularly release updates that fix bugs., close vulnerabilities and optimize the system. If your phone has not been updated for a long time, this may be the cause of unstable operation.

How to check and install updates:

  1. Open Settings → System → Software update (to Xiaomi: Settings → About phone → System update).
  2. Click “Check for updates.”
  3. If a new version is available, connect to Wi-Fi and install it (the battery charge should be >50%).
⚠️ Attention: if the phone is already very buggy, do not interrupt the update process! to "briku" (complete inoperability) of the device. If the update hangs during the installation stage for more than 30 minutes, see the section on resetting the settings. data-->

Battery charge > 50%|Connected to Wi-Fi|Closed all applications|Backed up important data-->

4. Diagnostics of overheating and battery

If the phone turns off under load, slows down in games or discharges in an hour - the problem may be overheating or a worn-out battery. Normal processor temperature during active use: 35-45°C. If it exceeds 50°C, this is critical overheating.

How to check:

  • 🌡️ Install the application AIDA64 or CPU Monitor for monitoring temperature.
  • 🔋 Check the battery wear in AccuBattery (health < 80% is a reason for replacement).
  • 🕹️ Launch a resource-intensive application (for example, Genshin Impact) and monitor the temperature.

Causes of overheating and solutions:

  • 🔥 Dirty charging connector → clean with a soft brush.
  • 📱 The case is blocking ventilation → remove it while playing.
  • 🔄 Background processes → open Settings → Applications → Running and terminate unnecessary ones.
  • 🔋 Bloated battery → immediately turn off the phone and contact service!
What to do if the phone turns off due to overheating?

Do not turn it on right away! Let cool for 15-20 minutes in the shade. If after turning on it overheats again, check the battery and thermal paste (on older models).

5. Resetting the partition cache (without data loss)

If the phone is slow, but you don’t want to lose data, try resetting Partition cache. This procedure clears temporary system files that may have been damaged after updates or crashes.

Instructions for most phones:

  1. Turn off the phone.
  2. Hold down the combination to enter Recovery Mode:
    • 📱 Samsung: Power + Volume Up + Bixby (if available).
    • 📱 Xiaomi/Redmi: Power + Volume Up.
    • 📱 Google Pixel: Power + Volume down.
  • In the recovery menu, select Wipe cache partition (control with volume buttons, confirm with the power button).
  • After cleaning, select Reboot system now.
    • ⚠️ Attention: on some models (for example Huawei with EMUI) the path to reset the cache may be different. If you are not sure, find the instructions for your model.

    This procedure does not delete your files, photos or applications, but may require re-entering passwords in some services (for example, Wi-Fi).

    6. Removing problematic applications

    Often the cause of glitches is viruses, poorly optimized games or applications with aggressive advertising. If your phone starts to slow down after installing new software, remove it.

    How to find the culprit:

    • 🛡️ Check your phone for viruses (Malwarebytes or Dr.Web Light).
    • 📊 Open Settings → Applications → Recent and see which application consumes the most resources.
    • 🔍 Enable Safe Mode (press the power button → "Safe Mode"). If the phone works fine in it, the problem is in third-party software.

    List of applications that often cause glitches:

    • 🎮 Games with aggressive optimization (on weak phones) other").Free Fire, PUBG Mobile on weak phones).
    • 📱 Launchers from third party developers (Nova Launcher, Action Launcher may conflict with the manufacturer's shell).
    • 🔊 Applications for saving battery or cleaning memory (often work on the principle of “treat one thing, cripple another”).
    💡

    If you cannot remove an application (for example, pre-installed by the manufacturer), disable it: Settings → Applications → Select an application → Disable.

    7. Reset to factory settings (last chance)

    If none of the previous methods helped, the only option left is hard reset (hard reset). This procedure deletes all data from the phone, returning it to its out-of-the-box state. Use it only if:

    • 📱 The phone constantly reboots.
    • 🔄 Stuck on the logo when turned on.
    • 🚫 Does not respond to touches or buttons.

    How to reset:

    1. Create a backup copy of important data (contacts, photos, messages).
    2. Go to Settings → System → Reset settings (to Samsung: General management → Reset).
    3. Select "Reset all data" and confirm.
    4. If the phone does not turn on, reset via Recovery Mode (see section 5, but select Wipe data/factory reset).
    ⚠️ Attention: after resetting, the phone will require you to enter the account data that was on it previously (protection Google, which was on it earlier (protection FRP). If you don’t remember the password, restore it in advance!

    8. When to contact the service center

    If after all the manipulations the phone continues to fail, the problem may occur. be hardware. Here are the signs that require repair:

    • 🔋 The battery is swollen or the phone turns off at 30-40% charge.
    • 💧 Smudges or vertical marks appear on the screen stripes.
    • 🔊 The speaker or microphone does not work (check in hardware component test via the code #0# on Samsung).
    • 📱 The phone does not turn on even after charging and reset.

    Average prices for repairs (Moscow, 2026):

    Problem Cost (₽) Term (days)
    Replacement battery 1 500 — 4 000 1
    Resoldering the charging connector 2 000 — 5 000 1-2
    Replacing the screen (OLED) 8 000 — 25 000 2-3
    Diagnostics of the motherboard 1 000 — 3 000 1-5

    Before visiting the service:

    • 📋 Check if they provide a guarantee for repairs (minimum 3 months).
    • 🔧 Check reviews about the workshop on Yandex.Maps or 2GIS.
    • 💰 Ask if they use original spare parts (this is critical). iPhone And Samsung this is critical).
    💡

    If the phone is under warranty, do not open it yourself! Contact the manufacturer's official service center (the list is on their website).

    FAQ: Frequently asked questions about Android glitches

    The phone slows down after the update - what to do?

    If lags appeared immediately after the update Androidtry:

    1. Clear partition cache (partition 5).
    2. Remove updates for system applications (for example, Google Play Services).
    3. Roll back to the previous version (if available through Fastboot or ODIN for Samsung).

    If nothing helps, wait for the next patch (usually released within 1-2 weeks).

    Is it possible to fix glitches without resetting the settings?

    Yes, in most cases they help:

    • Clearing the cache and data of a specific application (for example, Google Play Market often buggy due to the cache).
    • Disable animation in the developer settings (speeds up the interface).
    • Installing an alternative launcher (for example, Microsoft Launcher).

    Reset - extreme measure.

    Why does the phone glitch at night or at low temperatures?

    These are typical symptoms of a faulty battery:

    • At low temperatures (< 0°C), lithium-ion batteries lose capacity and may turn off.
    • At night, the phone discharges faster due to background processes (for example, backup Google Photos).

    Solution: replace the battery and disable unnecessary background processes in Settings → Accounts → Synchronization.

    How to transfer data before resetting if the phone is buggy?

    Use these methods:

    • 🖥️ Connect your phone to the PC via USB and copy the files manually.
    • ☁️ Enable synchronization Google Account (contacts, calendar, notes).
    • 📲 For photos/videos, use Google Photos with the "Free up space" function.
    • 🔄 If the screen does not respond, connect the mouse via USB OTG.
    After resetting, the phone is still slow - why business?

    Possible reasons:

    • 🛠️ Hardware problem: worn out memory (eMMC), damaged motherboard.
    • 🔄 Bad firmware: if resetting did not help, flash the phone official firmware via Fastboot or ODIN.
    • 🔋 Weak processor: on budget phones (for example, Redmi 9Aeven after a reset there will be lags in heavy applications.

    Solution: test the phone in Safe Mode. If it slows down, take it to the service.