You picked up Xiaomi or Redmi to call or launch an app and suddenly the screen goes out, the logo appears. MIUI, It's 30 seconds later, and it's ready to go again. Sound familiar? Spontaneous reboot is one of the most common problems on Xiaomi smartphones, and it can occur on both new models (Xiaomi 14, Redmi Note 13) and devices from 2018-2020 (Redmi). 9A, Poco X3). In 80% of cases, the problem can be solved independently without contacting the service center.
In this article, we will look at all possible causes, from software failures to hardware malfunctions, and give step-by-step instructions with photos and videos (where necessary). 6xx/7xx And MediaTek Helio G, which is the most vulnerable to "endless reboots" because of its energy-saving features, and if your phone only reboots when it's charging, when it's freezing or when it's running specific applications, we have our own solutions for each case.
1. Why Xiaomi phone itself is rebooting: top-7 cause
Before you start repairing, it is important to understand what causes the failures, and here are the most common reasons, ranked by the frequency of visits to Xiaomi service centers (2023-2026):
- 🔋 Worn-out battery – if the phone is over 2 years old, the battery may have swelled or lost capacity, leading to sudden power outages.
- 🤖 Firmware failure or MIUI — especially after the updates "over the air" (OTA) or manually stitching through Fastboot.
- 📱 Overheating of the processor - characteristic of devices on Snapdragon 8xx (Xiaomi 12 Pro for example, when playing games or shooting videos 4K.
- 🗑️ Full memory – if less than 10% of the total volume is free, the system begins to “glut".
- 🛠️ Application conflict – more often to blame optimizers (Clean Master), launchers or modified versions of games.
- 🔌 Faulty charging port – contact oxidation or plume damage can cause short circuits.
- 🧩 Hardware damage – falls, moisture or factory defect (for example, a memory chip dump).
According to service center statistics, 65% of cases are due to software failures or battery, and 35% are due to hardware problems. If your Xiaomi reboots regularly (every 5 to 30 minutes), it is likely to be the fault of firmware or hardware.
2. Quick Decisions: What to Do Right Now
Before you carry your phone for repair, try these 5 steps, which take no more than 10 minutes and help 40% of the time:
- Restart your phone in Safe Mode: Press the Power button → Hold your finger at the point Turn off → You'll be prompted to switch to Safe Mode, and that's only the system applications that work, and if the reboots stop, it's one of the apps you installed that's to blame.
- Clear the cache section. Dalvik/ART: Go to Settings. → The phone. → Version. MIUI (slip 7 once to activate Developer Mode. Then: Settings → Additionally. → For developers → Clear Dalvik's cache.
- Turn off automatic optimization: In Settings → Battery → Battery Optimization Select All Apps and Disable Optimization for Frequently Used Programs (e.g. WhatsApp, Telegram, Launchers).
- Check the CPU Temperature: Install the App AIDA64 or CPU Monitor and watch the temperature during the crash.°C - the problem of overheating.
- Reset network settings: In Settings → SIM-maps and mobile networks → Resetting network settings. This will help if crashes occur when calling or connecting to Wi-Fi.
☑️ Express check before repair
If none of these things work, move on to the next sections. Importantly, don't reset your phone to factory settings without a backup, which can make the problem worse if the firmware is to blame!
3. Battery: How to check and what to do
Worn-out battery is the leader among the causes of spontaneous reboots on Xiaomi over 2 years old.
- The phone turns off at 20-40% charge and only turns on from charging.
- Reboots when connected to charging or disconnecting the cable.
- The body was inflated (see the gaps between the screen and the frame).
- AccuBattery has a capacity of less than 80% of the factory.
How to check the battery without disassembly:
- Install AccuBattery or Battery Guru and see the actual capacity (in mAh).
- Connect the phone to charge and move the cable, and if the screen flashes or reboots, the problem is in the port or plume.
- Call your phone and press the case in the battery area at the same time, and if the connection is interrupted, the battery will swell.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| It is turned off at 20-30% charge. | Battery wear (capacity < 70%) | Battery replacement |
| Reboots when charging is connected | Short circuit in port or plume | Cleaning the port or replacing the plume |
| The body is deformed, the screen is "going away" | Battery bloating | Immediate replacement, risk of fire! |
| The phone is warming and discharged quickly | Failure of the charge controller | Diagnostics in the service |
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If the battery is swollen, don't use the phone until you replace it! risk short circuit and fire. In Xiaomi with a non-removable battery (like the Mi 11), a bloated battery can damage the screen or motherboard.
Cost of battery replacement in service centers:
- Redmi 9A/Note 9: 1 200–1 800 ₽ (original).
- Xiaomi 11T/12: 2 500–3 500 ₽ (glue-substituted).
- Poco F3/F4: 2 000–2 800 ₽.
Important:
calibrate it
4. Software failures: firmware, MIUI applications
If the phone reboots without being tied to charge or temperature, the software is to blame.
Failure after update MIUI
Typical situation: the phone has been updated "over the air" (OTA), And after the reboot, it started to reboot:
- Incomplete firmware download (interrupted update).
- Conflict with custom recaveri (TWRP).
- Mistakes in the assembly itself MIUI (especially in beta versions).
How to fix it:
- Reverse to the previous version: In Settings → The phone. → Update system press three points → Select an update package and download the old firmware from miuirom.org.
- Clearing the cache via Recovery: 1. Turn off the phone. 2. <power-button> + <volume> Before the Mi. 3 logo appears, select Wipe & Reset. → Wipe Cache. 4. Reboot.
- Hand-held firmware via Fastboot (for the experienced): Download the Mi Flash Tool and run your phone in Fastboot mode with a full reset.
How to find out the version MIUI kickback?
Annex conflict
Some programs can cause critical kernel errors that reboot the system, most often to blame:
- 🎮 Modified games (GTA San Andreas, PUBG Mobile with cheats).
- 🔧 Optimizers and Cleaners (Clean Master, DU Speed Booster).
- 📱 Launchers (Nova Launcher, Microsoft Launcher).
- 🔒 VPN-annexes (Psiphon, 1.1.1.1).
How to find the "culprit":
- Go to Settings → Applications → Application Management.
- Sort by installation date – check the recently installed ones first.
- Remove suspicious programs and monitor your phone for 24 hours.
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If the phone only reboots when a particular app (like Camera or Google Maps) is running, the problem is compatibility. Try updating the app or rolling it back to the previous version.
5.Overheating: How to diagnose and eliminate
Xiaomi on Snapdragon processors 8xx (Xiaomi 12 Pro, Black Shark 5 and MediaTek Dimensity (Redmi) K50, Poco F4) They're prone to overheating because of aggressive acceleration. CPU:
- In plain: 30-40°C.
- When playing/video: 45–55°C.
- Critical: 60°C and higher (causes emergency reboot).
How to lower the temperature:
- 🧊 Limit productivity: In Settings → Battery → Select Balanced or Energy Saving Performance Mode.
- 🎮 Shut down the acceleration. GPU: B Settings → Additionally. → For developers, find Disconnect. HW-superstructures (if any).
- 📱 Remove the cover - it can block the heat sink.
- 🔄 Update the firmware - in new versions MIUI Often improves thermal management.
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If the phone warms up even in plain, check the background processes in Developer Options (Settings) → For developers → Running services: Apps like Facebook or TikTok can load CPU 20 to 30% for no apparent reason.
If overheating occurs only when charging, the problem may be:
- Non-original charger (use the power supply on the 18W/33W Xiaomi).
- Damaged cable (check for clutters).
- Faulty charge controller (diagnosis required).
6. Hardware malfunctions: when repairs are needed
If all the software methods have been tried and the phone is still restarting, the problem is the hardware.
| Malfunction | Symptoms | Cost of repair (₽) |
|---|---|---|
| Memory chip dump (eMMC/UFS) | Reboots when reading/write files, errors in applications | 3 000–8 000 |
| Damage to the motherboard (infection of moisture, fall) | Spontaneous reboots, sensors do not work | 5 000–15 000 |
| Failure of the power controller | The phone does not turn on without charging, overheats when charging | 2 500–6 000 |
| Problems with battery plume | Reboots when wiggling your phone or connecting charging | 1 500–3 000 |
How to diagnose a hardware problem:
- 🔍 Visual inspection: check if there are any darkening on the board (a sign of overheating of components) or corrosion (infection of moisture).
- 🔧 Component Test: the service uses a multimeter to check the voltage on the chips.
- 📱 Checking for “broken” sectors: if the phone is restarted while copying files, memory may be damaged (eMMC).
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If the phone falls into water or is subjected to a strong vibration (for example, in a car), the malfunction may manifest itself in a few months.
When to contact the service:
- The phone is not powered on or loaded only in Fastboot.
- Reboots are accompanied by extraneous sounds (squeaking, crackling).
- Artifacts appear on the screen (stripes, flickering).
- The phone does not hold a charge (discharges in 1-2 hours without load).
7. Features for specific Xiaomi models
Some Xiaomi models have unique design or firmware issues, and these are the most common:
7.1. Redmi Note 8/9/10 Series
Problem: Reboot when connecting to Wi-Fi or mobile network.
Cause: An antenna module defect or conflict with MIUI 12.5+.
Decision:
- Back on. MIUI 12.0.3.0 (stable version).
- Turn off Wi-Fi Assist in the settings SIM-map.
- Replace the antenna plume (cost: ~1 200 ₽).
7.2. Xiaomi Mi 10/10T/11 Series
Problem: Overheating and reboots during games.
Reason: Snapdragon 865/888 Prone to trottling, and the cooling system is insufficient.
Decision:
- Install Game Turbo and limit it. FPS play up to 60.
- Use a cooling case or stand with a fan.
- Turn off Enhance Touch in the game settings.
7.3. Poco F3/F4/F5
Problem: Spontaneous reboots when overclocking the processor.
Reason: B MIUI Poco defaults to Snapdragon aggressive overclocking 7xx/8xx.
Decision:
- B Settings → Battery → Select the Performance Mode for Energy Saving.
- Turn off Dynamic Refresh Rate (if you have one).
- Install a custom core (such as FrancoKernel) for better thermal management.
7.4. Redmi 9A/9C/10A
Problem: Shuts down at 30-40% charge.
The reason: Cheap batteries for 5000 mAh lose capacity in a year.
Decision:
- Replace the battery (the original is worth it) ~1 500 ₽).
- Calibrate the battery: discharge to 0%, then charge to 100% without interruptions.
8.Prevention: How to Avoid Resets in the Future
To make your Xiaomi work consistently, follow these guidelines:
- 🔋 Battery: Charge your phone to 80-90%, avoid full discharge. Use only original chargers.
- 📱 Firmware: Do not install beta versions MIUI Check the reviews on the forums before updating (4PDA, XDA).
- 🎮 Games and load: Limit FPS In games (for example, in Call of Duty Mobile, set 60). FPS 90).
- 🛡️ Do not install applications from unknown sources (especially hacked games).
- 🧹 Clean: Once a month, clean the cache through Settings → Warehouse → Clear the cache.
If you drop your phone frequently or use it in extreme conditions (frost, humidity), consider buying a cushioned protective case and screen film. 8xx (Xiaomi 13, Black Shark Recommended to Use Cooling Stand for Long Playing Sessions.
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Check the battery status regularly through AccuBattery, and if the capacity has dropped below 80% of the factory capacity, prepare to be replaced within 3-6 months.