Does your Xiaomi suddenly turn off and turn on at random moments? Does the screen flash, the device "hang" on the MIUI logo, and then start again? This problem is familiar to many owners of the brand's smartphones - from budget Redmi to flagship Xiaomi 13/14. The causes can be hidden in both software failures and hardware malfunctions, but in 80% of cases they can be fixed on their own.
In this article, we'll look at all the possible causes of spontaneous reboots, from trivial overheating to motherboard damage. You'll learn how to diagnose a problem by symptoms, what settings to check first, and when to carry your phone to a service center. And for POCO and Black Shark models, we'll add some recommendations — their firmware often behaves differently.
Spoiler: 60 percent of the time, it's the fault of the damaged software or the conflicting applications, but if the reboots started after a drop or moisture hit, it's a signal that the contacts of the battery or the power chip are critically damaged, and you can't do without repair.
1. Software failures: viruses, updates and “broken” applications
So, to start with the most common, firmware problems, most of the time, spontaneous reboots occur after:
- 📱 Unsuccessful updates (especially if you interrupt the process or install “custom” firmware).
- 🦠 Virus infections (malignant) APK Third-party sources can block system processes).
- 🔄 Application conflict (e.g., memory optimizers or antiviruses from third-party developers).
- 🗑️ Cache overflows (the system can’t clear temporary files and “falls»).
How to check? Go to Settings → About → MIUI Version. If the firmware version ends in.0.1 or.0.2, it’s most likely a “raw” build with bugs. Also note the date of the last update: if it was more than a month ago, the system may have become outdated for the new apps to work properly.
After installing the new app | After updating MIUI| When connecting to charging |At random moments |Don't know-->
Especially often, crashes occur on the Redmi Note 10/11 and POCO X3/X4 models due to unstable custom cores. If you installed firmware through TWRP or Fastboot, there is a high probability that it was built with errors.
⚠️ Note: If the phone is rebooted precisely through 5-10 So, the minutes after you turn it on, this is a sign of the auto-disconnect timer in the engineering menu, and it could have been activated by viruses or optimizers ##4636## (section “Battery information»).
2.Overheating: When Xiaomi 'gaps' from load
Overheating is the second most common cause of sudden reboots. Xiaomi automatically shuts down at a CPU temperature above 65°C to avoid chip damage, but sometimes the system crashes and restarts as early as 50-55°C.
How to understand that overheating is to blame:
- 🔥 Phone hot to the touch (especially in the area of the camera or the lower part of the body).
- 🎮 Reboots occur during games (Genshin Impact, Call of Duty Mobile) or video recordings. 4K.
- ☀️ The problem is aggravated in the heat or when charging.
| Xiaomi model | Critical temperature | Typical hot zones |
|---|---|---|
| Redmi Note 12 Pro+ | 60-63°C | Top part (processor + camera) |
| Xiaomi 13 Ultra | 58-61°C | Center of the case (Snapdragon 8 Gen 2 chip) |
| POCO F5 | 65°C | The bottom part (battery + 5G module) |
| Black Shark 5 Pro | 70°C | Entire body (active cooling) |
What to do? First, check the background processes: go to Settings → Apps → Permissions → Autostart and disable autostart for unnecessary programs.
Are unnecessary widgets on the main screen disabled?|Whether it's off. 5G/4G background|Are the graphics processor drivers updated?|Clean vents (for Black Shark)-->
If the phone overheats even in simple – this may indicate a malfunction of the thermal paste (relevant for models older than 2 years) or a bloated battery (it presses on the motherboard, causing short circuits).
3.Battery problems: bloating, wear and tear, poor contact
The battery is the most vulnerable place in Xiaomi, with an average lifespan of 2-3 years, after which the capacity drops by 30-40%, and the power controller starts to fail.
- 🔋 The phone turns off when 20-30% charge and only activated from charging.
- 🔌 Reboots when connected to the network (especially if you use a non-original cable).
- 📉 B Settings → Battery. → Battery status shows capacity less than 80%.
- 💥 The case is swollen (you can check by putting the phone on a flat surface - if it staggers, the battery is inflated).
How to check the wear of the battery indiscriminately?
- Install the AccuBattery application (it will show the real capacity and discharge current).
- Connect your phone to charge and look at the charge speed: if it jumps (it’s 18W, then 5W) – a problem in the contacts or controller.
- Try to move the charging cable: if the phone is rebooting, the USB-C connector is to blame.
⚠️ Warning: If the battery is overblown, you can't keep using the phone! The risk of fire or explosion when charging increases by 10 times.
The Redmi 9/10 and POCO M3/M4 have a problem with the battery contacts detached due to cheap glue, in which case the phone can work normally but reboot with light impacts or shaking.
Conflicts with SIM-map
Few people know, but the problem is SIM-A card or mobile network can also cause reboots, which is because the Xiaomi modem is integrated into the processor, and its failures cause the entire system to crash.
Signs of malfunction:
- 📶 The phone is reloaded when you call or SMS.
- 🔄 The symbol of the network is constantly “blinking” (it appears, then disappears).
- 🚫 B Settings → SIM-Maps and mobile networks display error "No service».
- 🔧 Reboots started after changing the operator or installing a new one SIM.
What to do:
- Out. SIM-card and clean contacts with eraser or alcohol (dirty or oxidation may disrupt communication).
- Try inserting the SIM into another slot (if there are two).
- Turn off VoLTE and VoWiFi in your network settings – sometimes they conflict with firmware.
- Reset network settings: Settings → System → Settings Reset → Reset settings Wi-Fi, mobile network and Bluetooth.
💡
If the phone is rebooted only when connected to 5G, Try to forcefully switch to 4G customized SIM-Some regions of the network 5G Still unstable and causing Qualcomm modem failures.
On the models Xiaomi 12T and Redmi K50 there is a bug with a constant re-registration in the network, which can cause the phone to relapse every 10-15 minutes.
5. Hardware malfunctions: from the charging connector to the motherboard
If the software methods didn't work, the problem is the hardware, and here are the most common hardware reasons for reboots:
| Malfunction | Symptoms | Xiaomi models exposed to the problem |
|---|---|---|
| The USB-C connector is damaged. | Reboots when connecting charging or headphones | Redmi Note 11, POCO X3 Pro |
| Power chip dump | The phone is powered on only from charging, but does not hold the charge. | Xiaomi Mi 10, Mi 11 |
| Short circuit on the motherboard | Spontaneous reboots + phone warms up even when turned off | Redmi 9A, POCO M2 |
| Power button malfunction | The phone turns off when you press a button or spontaneously | Xiaomi Mi A3, Redmi 8 |
How to diagnose:
- 🔧 Check the charging connector: plug the cable in and move it slightly. If the phone reacts (charges/resets) - contacts are damaged.
- 🔊 Listen to the phone: a crack or squeak when pressing the body may indicate a short circuit.
- 🔦 Light a flashlight into the charging connector – if bent contacts or oxidation are visible, this is the cause of the failures.
⚠️ Warning: If the phone does not turn on after rebooting (hangs on the logo) MI Or flashing a red light, it's a sign of damage to the bootloader. Don't try to sew it yourself, you can finally brick the device without experience.
Black Shark models have a problem with the north bridge detachment due to overheating, in which case the phone can work normally, but reboot under intense graphics load (games, benchmarks).
6. Viruses and Malware: How They Cause Reboots
Malware rarely causes full-fledged rebukes, but some types of viruses can:
- 🛡️ Block system processes (e.g. Android.system or miui.guardprovider).
- 🔄 Run endless cycles (the phone tries to restart the service, but it crashes again).
- 📴 Substitute the bootloader files (the phone turns on, but immediately goes to the rebuke).
How to check:
- Go to Settings → Applications → Application Management and sort by installation date. Unknown applications (especially those with administrator rights) are the first sign of a virus.
- Check traffic consumption: if some programs consume gigabytes in the background, it is a botnet or a miner.
- Install Malwarebytes or Dr.Web Light and scan the system.
Viruses are often masked as:
- 📱 «Optimizers (Clean Master, DU Speed Booster).
- 🎮 «The game is for free fire (Free Fire, PUBG Mobile).
- 💰 Apps for “earning” (Cash Magnet, Easy Money).
How to remove the virus if the phone is not turned on?
On Redmi models with the bootloader unlocked, viruses can sew their own modules into the system, in which case only a complete flashing through the Fastboot will help.
7.Conflicts after the MIUI update: how to roll back
MIUI updates often bring not only new features but also critical bugs. For example, MIUI 14.0.3 for Xiaomi 12 had a bug with reboots when using Google Pay, and MIUI 13.0.5 for Redmi Note 10 Pro crashed when connecting to Wi-Fi 6.
If the phone starts restarting immediately after the update, try:
- Clear the system cache: Settings → Storage → Clear the cache.
- Reverse to the previous version via Recovery: 1. Turn off the phone. 2. Press Volume++ Power before the Mi Recovery logo appears. 3. Select Wipe & Reset → Wipe Cache. 4. Go to Reboot → System.
- If the rollback doesn’t help, run the stable version through the Mi Flash Tool (instructions at xiaomiflash.com).
💡
Before rolling back to old firmware, be sure to back up through Settings → Additional → Backup and Reset. Otherwise, you risk losing data!
There are separate firmware branches for POCO and Black Shark, and don’t install Redmi MIUI on these devices, which will lead to driver conflicts and constant reboots.