Why Xiaomi is Rebooting: A Complete Analysis of Reasons and Solutions

Have you noticed that your Xiaomi suddenly shuts down and turns on for no apparent reason? This behavior is not only annoying, but can signal serious problems, from software failures to failure of key components. Unlike scheduled reboots after updates, spontaneous reboots often indicate problems that require intervention.

In this article, we will look at all possible causes, from trivial overheating to damage to the motherboard, and give step-by-step instructions for diagnosing and fixing the problem. Particular attention will be paid to the Redmi Note 10/11/12, POCO X3/X4 and Xiaomi 12/13/14 flagships, as their hardware features affect the nature of the malfunctions. If your phone reboots only when connecting to charging or during games, this is a narrow case, we will analyze it separately.

1. Software failures: viruses, updates and application conflicts

In 60% of cases, Xiaomi’s spontaneous reboots are caused by software problems, which can be a consequence of a failed MIUI update, system process conflict, or malware activity. For example, after upgrading to MIUI 14.0.5, many Redmi Note 11 Pro users complained of cyclical reboots due to a bug in the core of the system.

How to check:

• 🔍 View the error log: go to Settings → About Phone → Version MIUI and tap 5 times on the "Core" line (the CIT menu will open, where you can find critical crash records in the Logs section).
• 🦠 Scan for viruses: Use Google Play Protect or Malwarebytes – some Trojans (such as Android.Triada) provoke reboots to mask their activity.
• 🔄 Update rollback: If the problem started after the update, try rolling back through Settings → System Update → Three points → Select the service pack (you need to run the old version firmware).

When connected to charging|During games/loads|Standby mode|Using the camera|After updating-->

Pay attention to the specific conditions of failure:

• 🎮 Games/benchmarks: CPU overheating (Snapdragon 8 Gen 1/2 is particularly prone to trottling).
• 🔌 Charging: A faulty power supply or cable (check with the ammeter - current above 2.5A may trigger protection).
• 📸 Camera: bug in the module driver (relevant for Xiaomi 13 Ultra with Leica optics).

⚠️ Warning: If the phone restarts exactly 5-10 minutes after turning on, this could be a sign of a hardware timer failure (often due to damage to the PMIC power controller).

2.Overheating: how to check and what to do

Xiaomi phones on Qualcomm Snapdragon chips (especially 888/8 Gen 1) are known for overheating problems. At core temperatures above 90°C, an emergency shutdown is triggered. Unlike MediaTek, where thermothrottle is smooth, Snapdragon often simply shuts down power without warning.

Diagnosis:

1. Install the CPU Monitor or AIDA64 and check the temperature during the load.
2. If the temperature is above 85°C in games, this is a critical value.
3. Try running 3DMark or Genshin Impact at maximum settings: if the phone reboots in the first 10 minutes, the cooling problem is a problem.

Decisions:

• ❄️ Thermopaste replacement: Relevant for models over 1.5 years old. Xiaomi service centers offer this service for 1500-2500 ₽.
• 🔧 Turn off turbo mode: In Settings → Battery → Performance modes, select Balanced.
• 🛡️ Use of cooling stands: Black Shark FunCooler Pro (reduces temperature by 10-15°C) is suitable for gaming.

💡

If your phone overheats even when it’s not easy, check the background processes through Settings → Apps → Permissions → Autostart. Turn off autostart for unnecessary programs (especially instant messengers and social networks).

Battery problems: diagnosis and replacement

A worn-out battery is the second most common cause of spontaneous reboots. When capacity drops below 70% of its face value, the power controller (PMIC) may misallocate the voltage, leading to instantaneous power outages. In the Redmi 9A, for example, after 500 charging cycles, the battery often sinks to 3.2V, causing a rebuke.

How to check the status of the battery:

1. Type ##4636## → in the dialer, select Battery Information. Compare charge level (should match the percentages on the screen) and status (if Bad is a replacement battery).
2. Use AccuBattery (revealing real capacity and wear). If the capacity is less than 2000 mAh for the Redmi Note 10 (rated 5000 mAh), the battery is critically worn.

Signs of a faulty battery:

• 🔋 The phone turns off at 20–30% charge, although the indicator shows the remainder.
• ⚡ Reboot when charging is connected (especially if the unit is more powerful 18W).
• 🌡️ The battery is swollen (check out – put the phone on a flat surface and spin: if it squabbles, it's 100% sign).

⚠️ Warning: If the battery is swelling, immediately turn off the phone and do not use it until you replace it! The risk of fire if the battery shell is damaged is extremely high.

Replacement cost:

• Original battery: 2000–4000 ₽ (depending on model)
• Analogue (e.g. Remax): 1000–2000 ₽, but the resource is 20–30% lower.

Backup data | Check warranty (if phone under 1 year) | Buy battery with capacity not lower than the original |Find service with soldering station (for models with glued battery) |Clarify whether IMEI will retain after replacement-->

4. Power Controller Failures (PMIC)

A power controller (PMIC) is a chip that controls the distribution of energy between the components of a phone, and when it is damaged, the phone can:

• 🔄 Reboot cyclically (on → off → on).
• 🔌 Do not turn on without a charger connected.
• 📉 Show an incorrect charge level (e.g., 100% → 0% at once).

Reasons for PMIC failure:

• ⚡ Power surges when using non-original chargers (particularly dangerous output units 9V/2A for phones that do not support Quick Charge).
• 💧 Moisture on the motherboard (even after drying, contact oxidation PMIC can occur after months).
• 🔥 Overheating due to prolonged high-load operation.

Diagnosis:

1. Connect your phone to charge and watch for behavior, and if it only turns on with the cable and turns off when it disconnects, that's a sign of a PMIC malfunction.
2. Check the battery voltage with a multimeter when charging. Normal: 4.2-4.4V. If jumping or not, the controller is the problem.

Decisions:

• 🔧 Flashing: Sometimes firmware via EDL- mode helps (requires an authorized Xiaomi account).
• 🛠️ Replacement PMIC: The cost of repair is 3000-8000 ₽ (depending on model). Redmi Note 9 cheaper, Xiaomi 13 Pro more expensive due to the complexity of soldering.

5 Conflicts with SIM- Card or Communication Module

It is rare, but there are cases when the phone restarts due to problems with the communication module or SIM- card.

• 📶 SIM- card is damaged (microcracks on the chip or contact oxidation).
• 📡 The modem firmware is outdated (relevant after the MIUI update when the baseband version is not the same as the kernel).
• 🔄 Conflict with an operator (e.g., when roaming or using Tinkoff Mobile virtual operators).

How to check:

1. Remove the SIM- card and use the phone without it 2-3 day. If the reboots stop, the problem is in the card or slot.
2. Check the modem version in Settings → About Phone → Baseband version. If it’s N/A or the version is very outdated (for example, MOLY.LR12A for the Snapdragon 865 in 2026), you need to flash it back.
3. Try inserting the SIM into another phone, and if there's an error, the card's not working.

Decisions:

• 🔄 Update the modem firmware via the Mi Flash Tool (need firmware with the current baseband version).
• 📱 Replace the SIM- card with a new one (especially if it is older than 3-5 years).
• 🛠️ Clean the SIM- card slot with alcohol - oxidation of the contacts can cause short circuits.

Hardware damage: motherboard, plumes, buttons

If the software methods didn't work, the problem is the hardware, and the most common ones are:

• 🔌 Retired plumes (especially after falls). For example, the POCO X3 Pro often leaves the battery plume.
• 🖱️ Sticking the power button (the phone perceives a long press as a command to restart).
• 🔧 Microcracks on the motherboard (due to falls or overheating).

Diagnosis:

• 🔍 Visual inspection: Disassemble the phone (if you have experience) and check the board for blackened components or cracks.
• 🎯 Button test: Press the power button 10 to 20 times in a row. If the phone reboots, the button malfunctions.
• 🔊 Listening: Listen to the reboot — if you hear a crack or click, it could be a short circuit.

Typical "iron" symptoms:

⚠️ Warning: If the phone doesn't turn on at all after a reboot cycle, don't try to flash it yourself! This could be a sign of a short circuit and a PC connection could crash the USB- port of the computer.

7. When to contact the service center

If you’ve tried all the techniques in this article, but Xiaomi’s phone keeps rebooting, it’s time to turn to the professionals.

• 🔥 The phone heats up to the point of being unable to hold it (risk of fire).
• 💥 Reboots are accompanied by sparks or the smell of burning.
• 🔌 The phone is powered neither by charging nor by a PC.
• 📉 The battery is swelled or deformed.

How to choose a service:

• 🔍 Official Xiaomi Center: Warranty for repairs, but more expensive (diagnostics – 500–1000 ₽).
• 📦 Warranty replacement: If the phone is under 1 year old and the problem is not your fault (e.g. factory defect PMIC), insist on free repair.

💡

If the phone is warranty, DO NOT open it yourself and DO NOT stitch it through unofficial tools!

FAQ: Frequent questions about Xiaomi reboots