Why Xiaomi is Rebooting and How to Fix It: The Complete Guide

Your Xiaomi suddenly turns off and on in a cycle, preventing you from using the device properly? This problem occurs on both the budget Redmi and the flagship Xiaomi 13/14. The causes can be rooted in software failures, a faulty battery or even mechanical damage. In 80% of cases, the problem can be solved independently without going to the service center.

In this article, we’ll look at all the possible causes of spontaneous reboots, from the banal (hang application) to the critical (damaged motherboard), and give you step-by-step instructions with illustrations, compatibility tables, and warnings about typical errors. We’ll focus on the Redmi Note 10/11/12, POCO F3/F4/F5, and Xiaomi 12T models, which are more likely to suffer from this malfunction due to the features of MIUI 14/15 firmware.

1. Software failures: from applications to firmware

To start with, the most common culprit behind reboots is software conflict, and according to service center statistics, 65 percent of cases are software-related.

• 📱 Hanging app: Games are especially often to blame (Genshin Impact, PUBG Mobile) or instant messengers (Telegram, WhatsApp) that are used >1 GB of RAM.
• 🔄 Failed update MIUI: version 14.0.3-14.0.6 known as a cyclic reboot bug on some models.
• 🗑️ Damaged system files: for example, after interrupted updates or manual removal of system files APK.
• 🛠️ Castom firmware: Unofficial builds of LineageOS or Pixel Experience can conflict with iron.

If the reboots occur only when a particular application is launched or after an update, the software is to blame. If the phone does not turn on for more than 30 seconds or is getting stuck on the MI logo, this is already a hardware malfunction (see section 3).

When you run a particular application | After updating MIUI | Accidentally, for no reason | After falling/hit |I don't know-->

The first thing to do is:

1. Launch your phone in Safe Mode (press the power button → hold off “Switch off” → confirm the transition).
2. If the reboots have stopped, remove the newly installed apps.
3. Check the version of MIUI in Settings → About Phone. If it's 14.0.3-14.0.6, you need a downgrade.

Run in Safe Mode |Remove suspicious applications |Check the version of MIUI|Clear the cache via Recovery |Reset the settings to factory-->

Battery: The main suspect

The battery is the most vulnerable part of a smartphone after 2-3 years of use, and if your Xiaomi reboots at low charge (10-30%) or while charging, it is 90% likely to be the battery, especially models with a capacity of >5000 mAh (Redmi Note 11 Pro+, POCO M4 Pro).

Signs of a faulty battery:

• 🔋 The phone turns off when 20-40% Charge, although the settings show a normal level.
• ⚡ Reboots occur exclusively on charging (especially with fast adapters). 33W/67W).
• 🌡️ The body is very heated in the lower part (where the battery is located).
• 📉 B Settings → Battery. → The battery state shows wear and tear >30%.

How to check the battery without disassembling:

1. Install the AccuBattery app (showing real capacity and wear).
2. Connect your phone to charge and move the cable, and if you reboot when the cable is moving, the problem is the connector or the power controller.
3. Put a flashlight on the back cover, and if you see bloating (even minimal) - immediately replace the battery!

⚠️ Warning: If your phone only reboots on charging, never use fast adapters (33W/67W/120W). Connect the standard unit to 5W/10W — This can temporarily resolve the problem before replacing the battery.

3. Hardware malfunctions: when without repairs can not do

If the software didn't work, and the battery is fine, the problem is the hardware.

• 🔌 Faulty charging connector: oxidized contacts or mechanical damage.
• 🔥 CPU overheating: especially relevant for Snapdragon 888/8 Gen 1 (Xiaomi models 11/12, POCO F3).
• 🛩️ Memory chip dump: after a fall or impact (symptom: phone reboots when vibrating).
• 🔄 Faulty Power Controller: The phone only turns on from charging, but turns off when the cable is disconnected.

How to diagnose a hardware problem:

1. Check your phone for overheating: install the Monitor CPU and run a stress test (3DMark or Geekbench), and if the temperature is above 85°C, you need to replace the thermal paste.
2. Connect your phone to your PC and check logs via ADB: adb logcat | grep -i "thermal\|overheat\|shutdown" If there are records of thermal shutdown in the logs - overheating is to blame.
3. Check the charging connector: if the contacts are blackened or bent, a replacement is required.

Typical prices for repairs (in Moscow, 2026):

• Replacement of the charging connector: 1,500–2,500 ₽
• The intersection of the power controller: 3000–5,000 ₽
• Thermopaste replacement: 1,000–1,500 ₽
• Repair after falling (diagnostics) + rations: from 4,000 ₽

⚠️ Attention: If the phone reboots when it vibrates (e.g. while ringing) it is a sign of memory chip failure. Don't shake the device or knock on it, it will exacerbate the problem.

4. Conflicts with firmware and MIUI updates

MIUI firmware is known for its bugs, especially in 14.x versions. If your Xiaomi has started to reboot after the update, here’s what to do:

Solutions:

1. Setting back to stable: Download firmware from miuirom.org (choose Stable over Beta). Go to Recovery (turn off phone → pinch Power + Vol+). Select Install update.zip and confirm installation.

Clearing the cache

In Recovery, select Wipe & Reset → Wipe Cache. This won’t delete your data, but it can solve the freeze problem.

Reset to factory settings

If nothing works, run Wipe All Data in Recovery.Warning: it will delete all data!

The models most prone to reboot bugs are:

• Xiaomi 12/12 Pro (MIUI 14.0.3–14.0.6)
• POCO F4 GT (Conflict with display drivers)
• Redmi Note 11 Pro+ 5G (modem issues)

💡

Before resetting, save IMEI! type in ##4636##, then go to Phone Information and write down IMEI 1 and IMEI 2. This will help restore the network after the reset.

External factors: temperature, humidity, mechanical damage

Sometimes the reason for reboots is not in the phone, but in the external environment.

• 🌡️ Extreme temperatures: Below -10°C: battery loses capacity, phone turns off. +45°C: Thermal protection is activated (especially on Snapdragon) 8+ Gen 1).
• 💦 Moisture: Even if the phone hasn’t sunk, condensation inside the case can cause a short circuit.
• 📶 Weak network signal: in areas with poor coverage (metro, basements) the phone can reboot due to constant attempts to connect.
• 🔌 Poor RAM: Cheap cables or adapters without protection can cause voltage surges.

How to minimize the impact of external factors:

• Use original chargers (especially for Quick Charge 4+ models).
• In the heat (+30°C), remove the case and do not play heavy games.
• If the phone is wet, don't turn it on! Put it in rice or silica gel for 24 hours.
• In places with poor connectivity, switch to 2G in network settings.

💡

If the phone only reboots outside in winter, the problem is not the hardware malfunction, but the physical properties of lithium-ion batteries.

6.Diagnostics through Engineering Menu and ADB

For advanced users: If standard methods don’t work, hidden diagnostic tools can be used.

Engineering Menu (MTK/Qualcomm):

1. Enter the dialer: ##4636###
2. Go to Battery Information and check: Charge level (should match the indicator). Temperature (normal: 25-40°C). Voltage (normal: 3.7-4.2V).

If the parameters are very different from the norm, the problem is in the battery or power controller.

ADB-diagnostics:

adb shell dumpsys battery


adb shell cat /proc/last_kmsg | grep -i "panic\|error\|reset"




adb shell getprop ro.boot.bootreason

If there are lines in the conclusion with hw_reset or thermal_shutdown — This confirms a hardware malfunction.

7.When to contact the service: checklist before the visit

If you’ve tried all the methods, but Xiaomi is still rebooting, it’s time to bring it to the service.

Make a backup copy of the data|Write it down. IMEI|Delete the password/pattern lock|Check the warranty on the Xiaomi website|Prepare a check (if the phone is guaranteed)|Cleaning the phone of personal data-->

How to choose a service center:

• 🔧 Xiaomi official service: warranty repair, but expensive and long (2-4 weekdays).
• 🛠️ Local workshops: cheaper and faster, but the risk of running into unqualified craftsmen.
• 🏠 Self-repairing: only if you have soldering experience and special equipment.

Average repair prices (2026):

⚠️ Note: If the phone is warranty, do not open it yourself! Xiaomi will cancel the warranty in case of violation of seals. Also do not agree to "flashing for money" in unofficial services - this can be done for free through the Mi Flash Tool.

FAQ: Frequent questions about Xiaomi reboots