Why Android reboots itself and how to fix it

Does your smartphone suddenly turn off and on without your participation? This problem occurs on devices of all brands - from budget Android suddenly turns off and on without your intervention? This problem occurs on devices of all brands - from budget Xiaomi Redmi to flagship Samsung Galaxy S23. Spontaneous reboots are not only annoying, but can also signal serious malfunctions: from processor overheating to battery failure.

In this article we will analyze all possible reasons for spontaneous reboots of Android devicesincluding software failures, hardware failures and even hidden functions of manufacturers. You will receive diagnostic checklists, step-by-step troubleshooting instructions, and advice on when to contact a service center. We will pay special attention to models with MediaTek Helio and Qualcomm Snapdragon —their chipsets more often than others encounter similar problems due to the characteristics of power consumption.

1. Overheating of the processor: why the phone “goes into reboot” under load

One ​​of the most common causes of spontaneous reboots is thermal throttling (thermal throttling). When the chipset temperature exceeds a critical threshold (usually 90–105°C), the system forcibly turns off the device to avoid damage. Most often this happens:

• 🎮 During long gaming sessions (especially in Genshin Impact, Call of Duty Mobile or PUBG)
• 📹 When recording video in 4K or streaming
• ☀️ In hot weather or under direct sunlight
• 🔋 When using non-original high current chargers

How to check the temperature? Install the application AIDA64 or CPU Monitor and open tab Sensors. If the processor temperature is consistently higher 80°C under normal load, this is an alarming signal. On devices with Snapdragon 8 Gen 2 and newer, the permissible maximum can reach 110°C, but constant operation at the limit reduces the life of the chipset.

What to do?

• 🛡️ Remove the case - it can block the heat sink
• ❄️ Use a cooling pad (for example, Black Shark FunCooler Pro)
• 🔄 Limit FPS in games through graphics settings (optimally: 60 FPS instead of 120 FPS)
• 🔋 Charge the phone when the screen is off

⚠️ Attention: If the processor temperature rises higher 105°C without load (for example, in standby mode), this may indicate data-i="72">or damage to the cooling system. In this case, disassembling the device is required. detachment of thermal paste or damage to the cooling system. In this case, disassembling the device is required.

2. Problems with the battery: when the battery “requests” replacement

Lithium-ion and lithium-polymer batteries degrade over time. After 300–500 charging cycles their capacity decreases by 20–30%, and the internal resistance increases. This leads to:

• 🔋 Sudden shutdowns at the charge level 20–40% (although the indicator shows more)
• 🔄 Spontaneous reboots when connecting/disconnecting charging
• 📉 Rapid discharge (for example, from 100% to 0% 2-3 hours without load)

How to check the battery condition? Enter the code ##4636##in the phone number, select Battery information and pay attention to the parameter Level health. The value below 80% is critical. It is also useful to use applications like AccuBatterythat show the real capacity in mAh (for example, if your battery shows 5000 mAh shows 3500 mAhit's time to change it).

Symptom	Probable cause	Solution
Phone turns off when 15–30% charged	Battery wear, calibration failure	Calibration via Battery → Reset statistics or battery replacement
Reboot when charging is connected	Short circuit in the power circuit	Checking the cable/power supply, diagnosing the charge controller
Fast discharge in standby mode	Background activity of applications or battery wear	Disable auto-sync, replace battery

On some models (for example, Samsung Galaxy S20+ or OnePlus 8 Pro) the problem may be related to power controller (PMIC). If replacing the battery does not help, diagnostics of the motherboard is required.

3. Firmware failures: when the software is to blame

Software errors are the second most common cause of spontaneous reboots. They can occur after:

• 📲 Android updates (especially on beta versions)
• 🔄 Installation of custom firmware (for example, LineageOS or Pixel Experience)
• 🛠️ Rooting via Magisk or SuperSU
• 📦 Conflict of system applications (for example, Google Play Services with the manufacturer's shell)

How to diagnose? Go to Settings → System → Error log (on some devices the path may differ). tags crash, bootloop or watchdog. If the log is empty, try turning on Developer mode (click on Build number 7 times in the phone settings) and activate USB debugging, then connect to the PC and use the command:

adb logcat | grep -i "reboot\|crash\|thermal"

What to do?

On devices Xiaomi i Redmi a common reason for reboots is failures in the service miui.analyticsIt can be disabled via Settings → Applications → Manage applications → System → MIUI Analytics (turn off autostart and permissions).

⚠️ Attention: If the phone reboots at the manufacturer's logo (bootloop), do not try flash it without a data backup. On some models (for example Samsung with Knox) this can lead to irreversible locking of the bootloader.

4. Application conflicts: who is crashing your Android?

Some applications can cause critical kernel errors (kernel panic), due to which the system is forced to reboot. Most often the culprits are:

• 🎵 Music players with aggressive sound optimization (for example, Poweramp or ViPER4Android)
• 📱 Launchers from third-party developers (Nova Launcher, Microsoft Launcher)
• 🛡️ Antiviruses with “deep protection” function) (Kaspersky, Dr.Web)
• 🎮 Console emulators (PPSSPP, Dolphin)

How to find the culprit? Start the phone in safe mode (hold the power button, then hold down “Turn off power” until the request appears). If reboots stop in safe mode, the problem is in one of the installed applications. To search:

1. Go to Settings → Applications → Recent and sort by time of use.
2. Uninstall suspicious applications (starting with those that consume the most resources).
3. Check the reviews in Google Play —users often write about similar problems.

On devices with Android 12+ you can use the built-in activity monitor: Settings → Battery → Battery usage → Three dots (⋮) → Show full usageLook for applications with abnormally high consumption. background.

List of the most “problematic” applications of 2026

According to the portal Android Authority, most often spontaneous reboots are caused by:

- Facebook (due to aggressive optimization of the video codec)

- TikTok (conflicts with graphics accelerator drivers)

- UC Browser (background cryptocurrency mining processes)

- Clean Master (damage to system files when “cleaning”)

- Fortnite (incompatibility with some chipsets MediaTek)

5. Hardware failures: when you can’t do without a service

If software methods do not help, the problem may lie in hardwareHere are the most common hardware causes:

Symptom	Probable breakdown	Repair cost (approximately)
Reboot due to vibration or shock	Failure of memory chips (eMMC/UFS) or processor	from 5 000 ₽ (resoldering of the chip)
Reboot when connecting headphones	Damage to the audio codec or 3.5 mm connector	from 2,000 ₽ (replacement of the connector)
Random reboots without patterns	Motherboard malfunction (often after moisture)	from 8,000 ₽ (diagnosis + repair)
The phone turns off when you press the case	Damage to the battery or flexible cable	from 3,000 ₽ (replacement of the cable/battery)

How to check?

• 🔍 Inspect the device for presence battery swelling (the case may swell in the area of the back cover).
• 💧 Check moisture indicators (small red or white dots under the SIM card cover If they are red, the device has been in contact with liquid.
• 🔊 Connect headphones - if a reboot occurs while playing sound, the audio chip is to blame.

On devices with Amoled screens (for example, Samsung Galaxy S or Google Pixel) a common cause of reboots — detachment of the display module. If artifacts (stripes, flickering) appear on the screen before rebooting, a screen replacement is required.

⚠️ Attention: If the phone reboots after a fall or impact, do not turn it on again - this may worsen the damage to the board. It’s better to take it to the service center right away.

6. Hidden functions of manufacturers: why some phones reboot “on a schedule”

Some brands implement firmware hidden mechanisms of forced rebootthat can work in the background. For example:

• 🔄 Xiaomi/Redmi/POCO: the function Automatic optimization reboots the phone once every 7 days to “clear memory”. Disabled in Settings → Special. capabilities → System optimization.
• 📱 Samsung: the service Device Care can initiate a reboot when the cache is critically full. To disable, go to Settings → Device Maintenance → Three dots (⋮) → Automation: The function sometimes conflicts with background processes, causing crashes. It is disabled in Settings → Device Maintenance → Three dots (⋮) → Automation.
• 🤖 Google Pixel: function Adaptive Battery sometimes conflicts with background processes, causing crashes. Disabled in Settings → Battery → Adaptive battery.

Also on some devices (for example, Huawei or Honor) it may work protection from non-original accessories. If you use a non-branded charger or cable, the system may forcefully reboot with an error USB Accessory Overcurrent.

How to check? Log in Settings → About phone → Software version and click on Build numberseveral times to activate diagnostic menu. In some firmware there is a hidden item Automatic reboots or Task scheduler.

7. Viruses and malware: when the phone is “infected”

Some viruses are specially programmed to forced rebootsto:

• 🕵️‍♂️ Mask their activity (for example, cryptocurrency mining).
• 📴 Block anti-virus scans.
• 💰 Show ads on top of all windows (adware).

Signs of infection:

• 📈 Unexplained traffic consumption (check in Settings → SIM cards and mobile networks → Data usage).
• 🔋 Rapid battery drain even in airplane mode.
• 📱 Appearance of unknown applications (for example, com.system.update or android.engine).

What to do?

1. Install Malwarebytes or Bitdefender and perform a deep scan.
2. Check the list of device administrators: Settings → Security → Device administratorsRemove suspicious ones. items.
3. If a virus is blocking the installation of an antivirus, boot your phone into safe mode and remove malware from there.

On devices with root access viruses can penetrate deeper. In this case, only a complete reset or flashing will help.

⚠️ Attention: Some viruses (for example, xHelper or Shuanet) are restored after removal, as they are registered in system partitions. In this case, flashing is required via fastboot or ODIN.

Frequently asked questions (FAQ)

My phone only reboots at night. What's the matter?

Most likely, one of the following reasons is to blame:

• 📵 Planned software update (check in Settings → System → System update).
• 🔄 Automatic optimization from the manufacturer (see section 6).
• 📡 Bad Wi-Fi/cell signal —the phone may reboot when constantly trying to connect.

Try turning off Wi-Fi and mobile data at night or activating mode Do not disturb.

Reboots started after replacing the screen. Is this related?

Yes, most often this indicates:

• 🔌 Bad. connected display cable (may short circuit the contacts on the board).
• 🔋 Damage to the battery during disassembly (check if it is swollen).
• 🛠️ Non-original screen with incompatible firmware (on some Samsung this causes conflicts with drivers).

Return to the service where you changed the screen and ask to check the connection of the cables.

The phone reboots when connected to the computer Why?

Possible reasons:

• ⚡ Short circuit in the USB port (try a different cable).
• 🖥️ Driver conflict (update ADB drivers on the PC).
• 📱 Data transfer mode (try selecting Charge only when connecting).

If the problem persists, check the port for damage (for example, bent contacts).

Can a virus cause reboots even in safe mode?

Yes, if virus:

• 🔐 Injected into boot partition (loaded to the system).
• 🤖 Has superuser rights (root).
• 📦 Replaces system files (for example, /system/bin/sh).

In this case, only a complete flashing via fastboot or ODIN will help (for Samsung).

Is it worth disassembling the phone yourself if it overheats?

No, if you do not have experience. Risks:

• 🔥 Damage thermal paste (can worsen cooling).
• ⚡ Static electricity can damage the chipset.
• 📱 Loss of tightness (on devices with protection IP68).

It is better to contact the service for cleaning dust and replacement of thermal paste (cost: from 1,500 ₽).