Why Xiaomi Redmi Note 4 is constantly rebooting and how to fix it

Xiaomi Redmi Note 4

Continuous resets

bootloop

In this article, we’ll break down all possible causes of Redmi Note 4 cyclical reboots (including Note models). 4X And the Note 4 Pro, let's take a step-by-step approach, from simple to radical, and also warn against dangerous errors. If your smartphone is stuck in an endless reboot, don't rush to bring it to the service: in 80% of cases, you can solve the problem yourself.

⚠️ Important: If the reboot started after a fall, moisture or physical damage, do not turn on the device. This can lead to a short circuit.

1. Reasons for the constant reboots of Xiaomi Redmi Note 4

Cyclic reboots rarely occur "just like that," most often signaling serious problems that can be categorized into 3 categories:

Software failures (70% of cases):

• 🔄 Damaged firmware after a failed update MIUI orthing.
• 📱 Application conflict, especially after installing modified applications APK or system tweaks.
• 🗃️ Overflowing memory (less than 500 MB of free space on the system partition).
• 🛠️ Incorrect kernel settings (for example, after using overclocking apps) CPU).

Hardware malfunctions (25% of cases):

• 🔋 Worn-out battery (capacity below 60% of nominal value).
• 🔌 Problems with battery contacts or charging connector.
• 🔥 Overheating of the processor due to clogged radiator or damaged thermal paste.
• 💾 Damaged Memory Chip (eMMC).

External factors (5% of cases):

• ⚡ Unstable charging voltage (use of poor quality cables/power supplies).
• 🌡️ Extreme temperatures (below) -10°C or higher +40°C).
• 📶 Problems with SIM-card or slot (corrosion, pollution).

🔍 How do you determine the cause? If the smartphone only reboots when you connect to the charger, there's a problem with the battery or the power supply. If the software is to blame after installing a particular application. If the reboots are accompanied by high heat, check the processor and battery.

Quick Decisions: What to Do First

Before you start taking drastic measures, try these 5 steps, which help 50% of the time and don’t require any special skills.

1. Forced reset

If your smartphone is stuck in a loop, hold the power button + Volume up 10 to 15 seconds until the screen goes out. Then turn on the device as usual.

2. Launch in safe mode

Safe Mode disables all third-party applications to log in:

1. Turn off your smartphone.
2. Hold on until the Mi logo appears.
3. Release Power and immediately press Volume down, holding until loading.

If there are no reboots in Safe Mode, one of the installed applications is to blame. Uninstall the latest added programs through Settings → Annexes.

Checking the battery

A worn-out battery can cause sudden reboots due to voltage drawdowns.

• Through the AccuBattery app (shows real capacity).
• In the engineering menu: enter in the dial ##4636## → Battery information.

If the capacity is below 2000 mAh (at a nominal value of 4100 mAh) - the battery must be replaced.

4.Cache cleaning

A cache that is overflowing can cause system failures.

1. Turn off your smartphone.
2. Keep your food on. + Volume up to enter Recovery.
3. Choose Wipe. → Wipe Cache (control - volume buttons, choice - power button).
4. Reboot the device (Reboot).

Verification of the charger

Use the original Xiaomi power supply (5V/2A) Or a certified analogue. Poor charging can cause power surges that lead to reboots. Try charging your smartphone from another adapter or through a different adapter. USB-port.

Keeping food on. + Volume up 15 seconds|Run it in safe mode.|Check the battery capacity|Clear the cache through Recovery|Try another charger.-->

⚠️ Warning: If your cache is cleaned, your smartphone doesn't turn on for more than 10 minutes, it's a sign of a damaged firmware. Don't try to re-clean the cache, but go to the firmware section.

3. Advanced methods: resetting and firmware

If the basics don't work, you'll have to take more serious measures, and it's important to be careful not to turn your smartphone into a brick.

Reset to factory settings (Hard Reset)

This will delete all data, but often solves problems with the software.

1. Enter Recovery (Power buttons + Volume up).
2. Choose Wipe Data → Wipe All Data.
3. Confirm the action (Confirm).
4. After reset, select Reboot.

⚠️ Warning: If the smartphone has been stuck on the Mi logo for more than 20 minutes after reset, the firmware is damaged.

Fastboot flashing through Fastboot

This method is suitable if the smartphone does not load even in Recovery.

• A computer with Xiaomi drivers installed.
• Official firmware for Redmi Note 4 (download from the official website).
• Mi Flash Tool.

Step-by-step:

1. Unpack the firmware in a folder without Cyrillic symbols.
2. Turn off your smartphone and press Power + Volume down to log into Fastboot.
3. Connect the device to the PC.
4. Launch the Mi Flash Tool, select the firmware folder and press Refresh.
5. Press Flash and wait until it is completed (10-15 minutes).

Critical information: If the Mi Flash Tool is an error anti_rollback, This means you are trying to install an older version. MIUI, It's not the one on the device, and you need to have a firmware with the bootloader unlocked or you need to call the service.

Firmware through TWRP (power-user)

If you have a custom recavator installed TWRP, squirt ZIP-firmware:

1. Download the right firmware (like LineageOS or Pixel Experience).
2. Move it. ZIP-memory-card.
3. Enter TWRP (Nutrition + Volume Up).
4. Choose Install. → specify ZIP-file → Swipe to Confirm.
5. After installation, run Wipe Dalvik/Cache.

💡

If the smartphone does not respond to any action (does not load in the Recovery/Fastboot), This could indicate a hardware malfunction, such as a motherboard or a power controller, and this requires a diagnostic at a service center.

4. Hardware malfunctions: when to carry in the service

If the software methods didn't work, the problem is the hardware, and here are the signs of hardware malfunctions that make self-repair dangerous:

1. Damaged motherboard

Symptoms:

• 🔥 The smartphone is very warm even when turned off.
• 🔌 Does not charge or shows an incorrect charge level (for example, 0% → 100% in a second).
• 📱 The screen flickers or shows artifacts before rebooting.

The reasons: fall, moisture, short circuit, repair requires soldering chips and costs from 3,000 to 8,000 rubles.

Faulty battery

Symptoms:

• 🔋 The battery is swelling (check if the back cover is lifting).
• 📉 The smartphone turns off at 20-30% charge.
• ⚡ Reboots when charging is connected.

Solution: battery replacement (cost 1,200-2,500 rubles) Use only original Xiaomi batteries or certified analogues (for example, from the same source). ZMI).

Problems with the charging connector

Symptoms:

• 🔌 Charging is only in a certain position of the cable.
• 🔥 The connector warms or smells of fire.
• 📱 Reboots when connecting to the network.

Solution: replacement of the connector (cost 1,500-3,000 rubles), often accompanied by the oxidation of the contacts on the board - in this case, cleaning with alcohol is required.

4. Damaged Memory Chip (eMMC)

Symptoms:

• 💾 Smartphone does not detect internal memory or shows reading errors.
• 🔄 Reboots when you try to write/delete files.
• 📱 The Mi logo is stuck with the E:Can't mount error. /data.

Solution: replacement of the chip (cost 5,000-12,000 rubles), in some cases, soldering helps, but this is a temporary measure.

⚠️ Warning: If after the fall, the smartphone began to reboot, and vertical stripes appeared on the screen - this is a sign of detachment of the display plume or damage to the graphics chip!

💡

Before visiting the service take photos IMEI (on the box or under the battery) and the serial number (in Settings → This will help to avoid the replacement of components.

5. How to Prevent Reboots in the Future

To avoid repeated failures, follow these guidelines:

1. Update. MIUI rightly

• 🔄 Use only official firmware from Xiaomi.
• 📱 Before updating, check the reviews on the forums (for example, 4PDA or XDA-Developers).
• 🔋 Charge the battery by at least 50% before the firmware.

2.Control the status of the battery

• 🔋 Do not allow a rank below 10%.
• ⚡ Use only original chargers.
• 🌡️ Avoid overheating (do not leave your smartphone in the sun or near heat sources).

3.Control installed applications

• 📱 Don't install it. APK source.
• 🔍 Regularly check the application rights in Settings → Permits.
• 🗑️ Remove unused programs (they may conflict with the system).

4. Clean the system regularly

• 🧹 Clean the cache once a month through Settings → Memory. → Cleanup.
• 🗃️ Save at least 1 GB of free space on the system partition.
• 🔄 Once every six months, optimize through Settings → Additionally. → Optimization.

5. Avoid physical injury

• 📱 Use a cover and protective glass.
• 💧 Do not use your smartphone in wet conditions.
• 🔧 Do not disassemble the device yourself (risk of damage to plumes).

💡

If you often flash your smartphone, keep a diary of updates: write down versions MIUI, Firmware dates and errors that occur, which will help you quickly roll back to the working version if you fail.

6. Frequent errors in repairing Redmi Note 4

Many users make the problem worse by doing the wrong thing.

1. Interrupt firmware

If you have started stitching your smartphone through Fastboot or Recovery, do not disconnect it from your PC or press buttons until the process is complete. Interruption can lead to complete loss of performance (eMMC soldering is required).

2. Use incompatible firmware

Firmware from Redmi Note 4 Global is not suitable for Redmi Note 4 China (and vice versa) You can also not install firmware from other models (for example, from Redmi Note). 5). It's gonna make a mistake. anti_rollback or».

3. disassemble the smartphone without experience

Self-replacement of the battery or charging connector can lead to:

• Damage to the display plume.
• Battery contact break.
• Short circuit with incorrect assembly.

4. Ignore backups

Before resetting or firmware, be sure to save data:

• 📱 Contact: Export to the VCF via Contact → Settings → Exports.
• 📷 Photo/video: copy to PC or cloud (Google Photos, Mi Cloud).
• 🔑 Passwords: sync through Google Smart Lock.

5. Use uncertified services

Low repair prices often mean:

• Installation of used components.
• Use of poor quality soldering equipment.
• No job security.

Check the service on review sites (Yandex.Maps, 2GIS) and ask for certificates.

⚠️ Warning: If after a failed firmware, the smartphone does not turn on and is not detected by the PC, do not try to “resuscitate” it with improvised means (for example, a heating dryer.

7. Alternative solutions: if nothing helps

If all methods have been tried and the Redmi Note 4 is still rebooting, consider these options:

1. Installation of custom firmware

Xiaomi's official firmware sometimes contains bugs. Alternatives:

• 📱 LineageOS - stable firmware based on Android.
• 🔄 Pixel Experience – Pure Android with Updates.
• 🛠️ MIUI Pro - modified version MIUI publicity.

To install, you will need to unlock the bootloader through the Mi Unlock Tool (the process takes up to 72 hours).

2.Use of the smartphone in mode ADB

If the screen is working but the system is not booting, you can control the device through ADB:

1. Connect your smartphone to your PC.
2. Enter in the command line: Adb devices (should display your device).
3. Copy important files: adb pull /sdcard/

3. Sale of parts

If the repair is not economically feasible (for example, you need to replace the motherboard), you can sell the smartphone for spare parts.

• 📱 Body with display: 1000-2000 rubles.
• 🔋 Battery: 300-800 rubles.
• 💾 Mother's fee: 2000-5 000 rubles (depending on the condition).

Sites for sale: Avito, Yula, thematic groups in VKontakte.

4. Exchange under the Trade-In program

Some stores (for example, Svyaznoy or M. Video) accept defective smartphones as a credit for buying a new one. The amount of Trade-In for Redmi Note 4 is 500-1 500 rubles.

5. Reprofiling of the device

If the smartphone is partially working, it can be used as:

• 📷 Camera (using the Open Camera app).
• 🎵 Musical player (by connecting through the OTG flash-drive).
• 📺 Media player for television (via TV) HDMI-adapter).

💡

If you decide to sell a defective Redmi Note 4, honestly indicate all defects in the description.

FAQ: Frequent questions about Xiaomi Redmi Note reboots 4