Xiaomi phone turns on and off: 7 reasons and what to do in 2026

If your Xiaomi smartphone starts to spontaneously turn on and off for no apparent reason, it’s not just an annoying glitch, but a symptom of a serious malfunction. This behavior can indicate both software failures (for example, after the MIUI update) and hardware problems – from a bloated battery to a damaged motherboard. In 80% of cases, the problem can be solved on your own, but it is important to act consistently so as not to aggravate the situation.

Many users mistakenly blame cyclic reboots on a “normal bug” and delay repairs, risking data loss or permanently disabling the device. Meanwhile, some causes (such as a short circuit in the battery) can lead to a fire or explosion, so you can’t ignore the problem categorically.

In this article, we’ll look at all the possible reasons why Xiaomi (including Redmi, POCO, Black Shark) spontaneously shuts down and turns on, and give step-by-step instructions for diagnosing and troubleshooting – from simple actions to complex repair procedures.

1. Software failures: when firmware or applications are to blame

The most common cause of spontaneous reboots is conflicts in the MIUI operating system. This can occur after a firmware update, installing an incompatible application or a failure in system services, and devices with custom firmware (such as LineageOS or Pixel Experience) are especially vulnerable, where errors in the kernel can lead to “infinite reboots”.

As a rule, program failures manifest themselves as follows:

• 🔄 The phone is switched off and turned on at regular intervals (e.g., every 5-10 minutes).
• 📱 On the screen before the reboot appears the message android.process.acore stopped or com.android.phone does not respond.
• 🔋 Reboots only occur when certain activities are taken (such as when you start a camera or connect to Wi-Fi).

If the failure occurred after the MIUI update, try rolling back the firmware to the previous version.

1. Download the official firmware for your model from the Xiaomi Firmware website.
2. Rename the file to update.zip and place it in the root directory of internal memory.
3. Go to Settings → About Phone → System Update, click on the three dots in the upper right corner and select Select a firmware file.

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If the phone doesn’t even turn on in Fastboot mode, try flashing it through the Mi Flash Tool in EDL mode. This will require an authorized Xiaomi account and a cable with Test Point contacts closing.

Attention! If the phone reboots when it's connected to charging, it could indicate damage to the power controller, and in this case, the firmware won't help, it requires a diagnosis at the service center.

Battery problems: when the battery becomes dangerous

A worn or damaged battery is the second most common cause of spontaneous shutdowns, and over time, Xiaomi's lithium polymer batteries lose capacity and their internal resistance increases, resulting in:

• ⚡ Abrupt voltage surges, due to which the phone turns off at 20-30% charge.
• 🔥 Battery bloating (visually visible by the bloating of the back cover or screen).
• 📉 Quick discharge even in standby mode (for example, from 100% to 0% in 2-3 hours).

You can check the battery status using the AccuBattery app (available on Google Play), if the battery health score is below 70%, it should be replaced, and note the following signs:

Critical information: If the Xiaomi phone starts to turn off when charging and the body is noticeably heated, you can not leave it on the socket unattended.

3.Overheating: Why the phone turns off from high heat

Xiaomi is equipped with a system of protection against overheating, which forcibly turns off the device when a critical temperature (usually 60-65 ° C) is reached.

• 🎮 Genshin Impact, Call of Duty Mobile),
• 📷 Video recordings in 4K,
• ☀️ Being under direct sunlight,

The problem is probably overheating.

To diagnose overheating:

1. Install the AIDA64 app and check the processor temperature in the Sensors section.
2. If the temperature exceeds 50°C in plain or 70°C under load, cleaning or replacement of the thermal paste is required.

The hottest Xiaomi models (according to GSMArena tests):

• 🔥 POCO F3 GT (48°C in games),
• 🔥 Black Shark 4 Pro (up to 52)°C for long-term loading),
• 🔥 Redmi Note 10 Pro (cooling problems due to compact body).

Use a heat sink case |

Turn off the background activity of applications |

Reduce screen resolution to Full HD|

Play with aviation mode enabled (flight mode)|

Clean the dust charger regularly-->

Attention! ⚠️ If the phone turns off at a temperature below 40°C, the problem may be a faulty thermal sensor, which requires a motherboard diagnosis.

Hardware malfunctions: from the power button to the motherboard

If the software methods didn't work, it's probably because of the hardware, and the most vulnerable components are:

1. Power button - if it's stuck or oxidized, the phone can perceive random taps as a command to turn off.
2. The power controller (PMIC) is responsible for the distribution of energy, and if damaged, it can cause cyclical reboots.
3. eMMC/UF memory – If the memory chip starts to crumble, the system loses access to critical files and restarts.

Diagnosing hardware problems on your own is difficult, but there are indirect signs:

• 🛠️ The phone is turned off at any physical impact (shaking, pressing the body).
• 🔌 Reboots only occur when charging is connected.
• 📵 Artifacts (strips, flickering) appear on the screen before turning off.

The Xiaomi Redmi Note 9 Pro has a problem with battery contacts being soldered off due to poor-quality soldering, in which case the phone can turn off at the slightest vibration, the solution being soldering contacts in the service center.

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If the phone turns off when you press a specific area of the case, it almost always indicates damage to the motherboard (such as a crack under the processor).

5. Settings reset: Last chance before repair

If the phone turns on but reboots cyclically, try a hard reset, which will delete all the data, but return the device to the factory settings.

1. Turn off the phone (if it doesn’t turn off by itself, press the power button for 10-15 seconds).
2. Press the combination Volume up + Power button before the Mi logo appears.
3. In the Recovery menu, select Wipe Data → Wipe All Data (manage by volume buttons, confirm by power button).
4. After reset, select Reboot.

Attention! ⚠️ On some models (for example, Xiaomi Mi 11) to log into Recovery requires first to connect the phone to the PC and use the command:

adb reboot recovery

If the reset didn't work, try flashing your phone through the Mi Flash Tool in Fastboot mode.

1. Download the official firmware for your model from the Xiaomi website.
2. Install the Mi Flash Tool on your PC.
3. Connect your phone in Fastboot mode (clamp Volume down + Power).
4. In the program, select the downloaded firmware file and press Flash.

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If the phone is stuck on the Mi logo after firmware, try repeating the process with the Clean All option disabled in the Mi Flash Tool.

6.When to contact the service: 5 signs of critical breakdown

Not all problems can be solved by yourself. Contact Xiaomi Service Center if:

• 💥 Phone explodes or smokes when charging.
• 🛠️ Reboots are accompanied by extraneous sounds (squeaking, crackling).
• 📱 Colored stripes or flickering appear on the screen before turning off.
• 🔋 The battery swelled (seems to deform the body).
• 💻 The phone is not detected by the computer in Fastboot mode.

The cost of repair in official Xiaomi services (in Moscow, 2026):

Attention! ⚠️ Don’t trust repairs to unofficial workshops if they offer:

• 🔧 "Fast ration without diagnosis (risk of damaging fees).
• 🔋 Installation of a non-original battery (can swell in 2-3 months).
• 💻 Firmware through uncertified tools (risk of blocking Mi Account).

7.Prevention: How to Prevent Spontaneous Shutdowns

To minimize the risk of repeated failures, follow these guidelines:

• 🔋 Use Xiaomi’s original chargers (especially for Quick Charge-enabled models).
• 📱 Clean the cache regularly through Settings → Memory. → Cleanup.
• 🛡️ Install antivirus (such as Malwarebytes) to protect against malicious applications.
• ☀️ Avoid overheating – Do not leave your phone in the sun or near heat sources.

For models with removable battery (e.g. Redmi 4X) it is recommended to:

1. Once every 3 months to remove the battery and clean the contacts with alcohol.
2. Store the spare battery at a temperature of 10–25 ° C (not in the refrigerator!).

Important: If you use custom firmware, update it only through official sources (e.g., XDA Developers).Incompatible cores can lead to a blink (complete failure) of the device.

FAQ: Frequent questions about Xiaomi's spontaneous shutdowns