Your Xiaomi suddenly started rebooting at random moments — during a call, when the camera is running, or even in standby mode? This problem is familiar to many owners of the brand’s devices, from budget Redmi to flagship Mi or POCO. Cyclic reboots are not only annoying, but also signal serious problems — from software glitches to critical wear of components.
In this article, we will not just list the possible causes, but analyze them with reference to specific models and versions of MIUI. You will learn how to distinguish hardware failure from software bug when resetting helps, and when it is time to carry the phone to the service. We will pay special attention to the pitfalls - for example, why after updating the firmware problem can worsen, and what to do if the smartphone does not turn on even after a hard reboot.
We've gathered data from Xiaomi's official forums, service center reports, lab tests, so you can diagnose the problem as accurately as possible, and let's start with the simplest of things, and gradually move on to complex cases that require expert intervention.
1. Software failures: when firmware or applications are to blame
In 60 percent of cases, persistent reboots are associated with software conflicts, which can be either a curved MIUI update or a third-party app that hangs the system.
For example, after upgrading to MIUI 14, many Redmi Note 10 Pro and POCO X3 Pro users complained about spontaneous reboots due to a bug in the system kernel. And Mi 11 Ultra owners experienced reboots when activating 120 Hz mode - the problem was solved by a rollback to the previous version of the firmware.
- 📱 Incompatible Update: New Version MIUI It may contain bugs for your model (especially for devices older than 2 years).
- 🔄 Application Conflict: Antiviruses, launchers, or aggressive optimization games often cause a critical error system_server.
- 🗑️ Clogged memory: Less than 500MB of free space on the system partition leads to failures when writing logs.
- 🔧 Developer Settings: Activating options like Don’t Turn Off the Screen or Background Limit Process can destabilize your work.
How to check? Go to Settings → About Phone → MIUI Version and compare the current firmware with the latest stable builds on the official website. If the versions match, but the problem remains, it is not the update that is to blame, but another software.
⚠️ Note: If the smartphone is rebooted when connecting to Wi-Fi or mobile network, the problem may lie in the modem module. This is already a hardware failure, and firmware here will not help.
2. Hardware causes: battery, motherboard and overheating
If the software methods didn't help, it's time to check the hardware.The most vulnerable components in Xiaomi smartphones that lead to cyclical reboots:
- Bloated battery: Even if the battery looks normal, the inner layers of the battery may have deformed, leading to short circuits and emergency shutdowns, especially on Redmi 9 and Redmi Note 8 models after 1.5-2 years of use.
- Faulty Power Controller: The PMIC chip (like the Qualcomm PMI8998 in the Mi 10) is responsible for power distribution, and when it fails, the phone can only turn on while charging or restart when the voltage drops.
- CPU overheating: If the smartphone heats up above 65°C (checked through Settings) → Battery condition, protection goes off and a forced rebuke occurs. POCO F3 Black Shark under intense loads.
- Oxidized contacts: When moisture or condensate hits the motherboard, it causes microcircuiting, and the symptom is that the phone reboots when it vibrates or changes its position in space.
For diagnosis:
- Check the battery for bloating: put the smartphone on a flat surface and spin it. If it swings like a pendulum, the battery is deformed.
- Run the heating test: install the AIDA64 app and check the CPU temperature under load (e.g. in Genshin Impact).
- Look at the charging indicator: if it flashes red or the phone only turns on from the charger, the problem is the power chain.
| Symptoms. | Probable cause | Frequent case models |
|---|---|---|
| Reboot when connecting charging | Faulty power controller or cable | Redmi Note 7, Mi 9T |
| Rebuttal on vibration or impact | Oxidized contacts of battery or board | POCO X2, Redmi 8 |
| Cyclical reboot on the MI logo | Boot or recovery section damaged | Mi A2, Mi Mix 2S |
| Turn off when loading (games, camera) | Processor overheating or trottling | Black Shark 3, POCO F1 |
⚠️ Warning: If the smartphone reboots with a characteristic click in the speaker, this is a sign of a short circuit on the board!
3. How to diagnose the problem: step-by-step instructions
Before you bring your phone to the service, check this checklist, which will help narrow down the possible causes and save time:
Check the space in memory (should be ≥1 GB)
Disable all third-party apps (especially antivirus and optimizers)
Launch your phone in Safe Mode (hold the power button → “Reboot Safe Mode”)
Check the CPU temperature in AIDA64 or CPU Monitor
Connect another charger (original, with Quick Charge support)
Reset network settings (Settings) → SIM-maps and mobile networks → Resetting settings)
Try to boot up in Recovery Mode (power button) + volume)-->
If you stop rebooting in Safe Mode, it's one of the apps you installed, and you take turns removing them, starting with the last ones you installed, and if you have a problem, you go to hardware diagnostics.
For advanced users: connect your smartphone to your PC and check error logs through ADB. Team to output the latest critical events:
adb logcat -d | findstr -i "error fatal crash reboot"Look for lines that mention:
- Thermal-engine - overheating;
- battery_voltage — battery problems;
- Kernel panic is a critical kernel error.
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If the smartphone reboots on the MI logo but goes into Fastboot Mode (power button + volume down), try reflashing it through the Mi Flash Tool. Download the firmware for your model from the Xiaomi Firmware website and select clean all mode (full clean).
4. Solutions for software failures: from reset to flash flashing
If the diagnosis showed that the problem in the software, use these methods (from simple to complex):
Soft resetting of settings
Delete user data, but save firmware, suitable if the failure is caused by a conflict of settings or cache:
- Go to Settings → About the phone → Reset settings.
- Choose Reset all settings (not to be confused with Reset to factory!).
- Confirm the action and wait for the reboot.
4.2 Clearing the cache via Recovery Mode
Helps if the phone is loading but is not stable:
- Turn off your smartphone.
- Press the power button + volume up until the Mi Recovery logo appears.
- Select Wipe & Reset → Wipe Cache (control – volume buttons, confirmation – power button).
- Reset the device.
Fastboot flashing through Fastboot
This is the only way to bring back a smartphone that is fixated on the MI logo or constantly goes into rebuke when booting, requiring a PC with Qualcomm or Mediatek drivers installed (depending on your model’s processor).
Step-by-step:
- Download the Mi Flash Tool and firmware for your model (for example, tucana_global_images_V14.0.2.0.TKFMIXM_20230310.0000.00_12.0_global For the Redmi Note 8 Pro).
- Unpack the archive with firmware in a folder without Cyrillic characters.
- Launch the Mi Flash Tool, press Select and specify the path to the firmware folder.
- Connect the off smartphone to the PC, holding the volume button down (should be determined as to how to do it). COM-port).
- In the program, select Clean All mode and press Flash.
It takes 5-10 minutes, and when it's done, it'll reboot in the factory state.
⚠️ Warning: Flashing through clean all deletes all data, including photos and contacts. If you don't have backup enabled in Mi Cloud, it won't be possible to restore the information.
5. Hardware repair: when without service can not do
If all the software methods have been tried and the smartphone is still restarting, it's time to contact the service.
- 🔋 Battery replacement: Cost: 1,500 to 4,000 ₽ For the Redmi Note 11, the original battery will cost a lot of money. ~2 500 ₽, Mi 11 — ~3 800 ₽.
- 🔧 Repair/replacement of power controller: Complicated soldering, price from 3,000 ₽. Often requires replacement of multiple chips (for example, PMIC + booster).
- 🌡️ Replacement of thermopaste: Relevant for gaming smartphones (Black Shark 4, POCO F3 GT). Cost: 1,000-1,500 ₽.
- 💧 Oxidation Cleaning: If the phone gets caught in the rain or in the bathroom, the board is washed in an ultrasonic bath (from 2 000). ₽).
Average prices for repairs in service centers (Moscow, 2026):
| Service | Models (examples) | Cost, ₽ |
|---|---|---|
| Battery replacement | Redmi 9A, POCO M3 | 1 500–2 000 |
| Renovation of the supply chain | Mi 10T, Redmi Note 10 Pro | 3 000–5 000 |
| Processor soldering | Black Shark 2 Pro, Mi Mix 3 | 8 000–12 000 |
| Diagnosis + cleaning | Any model you want. | 1 000–1 500 |
Where to repair:
- Official Xiaomi service centers: Work warranty 6-12 months, but prices are 20-30% higher.
- Unofficial workshops: Cheaper, but risk running into unskilled craftsmen. Look for reviews on Yandex.Maps or 2GIS.
- Self-repairing: Only if you have experience of soldering SMD-First, practice on a non-working phone.
What happens if you ignore the constant reboots?
Prevention: How to prevent repeated failures
Even after a successful repair, there is no guarantee that the problem will not return. To minimize the risks, follow these recommendations:
- 🔋 Charging: Use only original or certified chargers (e.g. Xiaomi) MDY-12-EU Avoid cheap cables without Quick Charge support.
- 🌡️ Temperature: Do not leave your phone in the sun or near heat sources. The optimum operating temperature is 10-35.°C.
- 📱 Updates: Install only stable versions MIUI (Check the reviews on the forums before updating (4PDA, XDA Developers).
- 🛡️ Moisture protection: Even if your model has a certificate IP53 (For example, Redmi Note 12, avoid direct water, and condensation inside the case is one of the main causes of oxidation.
- 🗑️ Memory Cleanup: Regularly delete the app cache (Settings) → Annexes → Clear the cache) and do not clog the internal memory to the end.
For advanced users:
- Turn off auto-update apps in Google Play – sometimes background updates lead to conflicts.
- Install Magisk and Universal SafetyNet Fix if you use custom firmware – this will prevent failures due to incompatibility with Google Services.
- Set the thermal limit through Kernel Auditor: Reduce the maximum CPU frequency by 10-15% to reduce heat.
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If your Xiaomi is older than 3 years, consider replacing the heatpast and battery in advance – this will extend the life of the device by 1-2 years and prevent spontaneous reboots.