Why Xiaomi smartphone itself is rebooting: a full analysis of the causes and solutions

You have your own Xiaomi, Redmi or POCO, To check the notifications, and suddenly the screen goes out, the logo appears. MIUI, And after a few seconds, the phone is back on the job, and it happens several times a day, or even every hour. Why does that happen? Spontaneous reboots are one of the most common problems on Xiaomi devices, and there may be a dozen reasons for this. from harmless application failure to critical motherboard damage.

In this article, we will not only list the possible culprits of the problem, but also show how to accurately diagnose the cause by indirect signs (for example, at what time of day the reboot occurs or whether it is preceded by heating the case), you will also find step-by-step instructions for each case – from cleaning the cache to flashing through Fastboot – and at the end a checklist that will help you not miss important details.

We will pay special attention to Xiaomi models on MediaTek processors (for example, Redmi Note 11 or Xiaomi). POCO M4 Pro), where spontaneous rebuts are often associated with kernel errors, as well as devices with an unlocked bootloader - they may have a problem in an incorrectly installed custom recaveri.

1.Overheating: When the phone turns off "for self-rescue"

If your Xiaomi reboots while playing, charging, or using the camera for a long time, check the body temperature first.°(C) the device is forced to shut down to prevent damage to the battery or chipset.

How to understand that it is the fault of overheating:

• 🔥 Phone body hot to the touch (especially in the processor area or near the camera).
• ⚡ Reboot occurs during resource-intensive tasks: streaming video in 4K, Games (Genshin Impact, Call of Duty Mobile.
• ☀️ The problem is exacerbated in hot weather or if the phone is lying in direct sunlight.

What to do:

1. Remove the cover - it can block the heat transfer.
2. Close all background applications (especially messengers and social networks that actively use the processor).
3. Check if the air vents are clogged with dust (relevant for active cooled models such as the Black Shark).
4. If the phone warms up even in simple, reset the settings to factory (more on this in section 5).

⚠️ Warning: If after overheating the phone does not turn on or hangs on the logo MIUI, Don't try to flash it right away! First let the device cool off for 1-2 hours. Attempting to force it on could damage the power controller.

2. Failures in firmware: is it to blame MIUI?

Operating system MIUI It's known for its features, but sometimes they turn into bugs:

• 📱 Updates MIUI (Especially if you missed the 1-2 version and updated through the version»).
• 🔄 Custom firmware installations (e.g. Pixel Experience or LineageOS) with errors.
• 🛠️ Root or modification of system files via Magisk.

How to check:

1. Go to Settings. → The phone. → Version. MIUI And look at the date of the last update. If the reboot started right after it, it's the firmware's fault.
2. Check the error log: Install the Logcat Extreme app and find records with the reboot or thermal tag.

Decisions:

• 🔄 Reverse to the previous version MIUI via Fastboot (instructions in Section 6).
• 🧹 Clear the cache of the section Dalvik/ART through TWRP (if established).
• 🚫 Turn off automatic updates MIUI In Settings → The phone. → Updating the system → ⚙️ → Auto-update.

3. Battery problems: wear or bloating

The battery is one of the most vulnerable parts of Xiaomi smartphones, and over time, its capacity decreases and the power controller starts to work unstable, if the phone reboots when:

• 🔋 Connection/disconnection of charging.
• 📉 A sharp drop in charge level (for example, from 30% to 1% per minute).
• 💥 Physical pressure on the body (a bloated battery puts pressure on the motherboard).

90% probability of the battery being to blame.

How to diagnose:

1. Check the battery status in the AccuBattery app, and if the capacity has dropped below 70 percent of its nominal capacity, it's time to change.
2. Check if the battery is swelling: put the phone on a flat surface and spin it. If it is swaying or there is a gap between the case and the screen, this is an alarming sign.
3. Connect your phone to charge and move the cable. If you're rebooting, the problem is the connector. USB-C power-controller.

⚠️ Warning: If the battery is swollen, you can't keep using the phone! This can cause fire or damage to the motherboard.Take the device to the Xiaomi service center or replace the battery yourself (if you have experience).

4. Application conflict: who is to blame?

Sometimes the culprit of spontaneous reboots is one particular application that conflicts with the system, most often it is:

• 🎮 Games with aggressive optimization (Free Fire, PUBG Mobile).
• 🔒 Antiviruses or Cleaners (Clean Master, 360 Security).
• 📱 Rooting Applications (KingRoot, Magisk Manager).
• 🔄 Launchers from third-party developers (Nova Launcher, Microsoft Launcher).

How to find the "culprit":

1. Launch your phone in Safe Mode (press the power button) → long tap on "Switch off» → «Safe Mode Reboot. If the reboots have stopped, third-party software is a problem.

If you find a problem app, but you need it (for example, a banking one), try:

• 🔄 Update it to the latest version.
• 📥 Install an older version (download) APK APKMirror).
• 🚫 Turn off background activity for it in Settings → Annexes → Permits → Auto-start.

5. Settings reset: when it really helps

If all previous methods have failed and the phone continues to reboot, it’s time to consider a hard reset that will remove all data from the device, but often resolves problems with:

• 🗃️ Damaged system files.
• 🔄 Incorrect settings MIUI.
• 📱 Residual files after removal of applications.

How to reset:

1. Back up important data (photos, contacts, messages) via Mi Cloud or Google Drive.
2. Go to Settings → Additional → Recovery and Reset → Resetting.
3. Select “Erase all data” and confirm the action.

If the phone doesn’t turn on or freezes on the logo, reset via Recovery:

1. Turn off the device.
2. Press Volume Up + Power before the Mi Recovery logo appears.
3. Select Wipe Data → Wipe All Data (control – volume buttons, confirmation – power button).

💡

Write down before resetting. IMEI In rare cases, after a hard reset, it may reset and you will need to restore it through Engineer Mode.

⚠️ Note: Some Xiaomi models (such as the Redmi Note 8 Pro) may require re-assignment of your Mi Account after a reset.If you forget your password, the phone will turn into a "brick.

6. Hardware malfunctions: when without service can not do

If none of the software methods worked, the problem is probably hardware, and here are the most common "iron" reasons for spontaneous reboots:

• 🔌 Damage to the motherboard (often after falls or moisture hits).
• 🔋 Failure of the power controller (the phone is turned off when charging is connected).
• 📡 Problems with the antenna module (reboots when calling or connecting to the mobile network).
• 🔥 Burnt processor (usually after severe overheating).

How to diagnose:

• Check the phone for physical damage: cracks on the board, oxidation of contacts, traces of corrosion.
• Connect the device to your PC and start the Mi Flash Tool. If the phone is not detected even in Fastboot mode, there is a problem with the hardware.
• See if the charge light is flashing when it's off, and that might indicate a short circuit.

What to do:

• 🛠️ Contact the Xiaomi service center (if the phone is guaranteed).

💡

On Xiaomi models with MediaTek processors (for example, Redmi) 9A) If the phone reboots even after flashing, take it to the diagnostics!

7 Other causes: from viruses to bad SIM card

Sometimes the problem is caused by non-obvious factors, and we'll check them out.

If you suspect a virus but the antivirus doesn’t find anything, try:

1. Remove any suspicious apps (especially those not downloaded from Google Play)
2. Disable installation from unknown sources in Settings → Confidentiality.
3. Reset the settings (Section 5).

FAQ: Frequent questions about Xiaomi reboots