Why Xiaomi Redmi phone crashes: a full analysis of the causes and solutions

Xiaomi Redmi smartphones have long gained popularity thanks to a combination of affordable price, powerful hardware and flexible MIUI firmware. However, even such devices are not immune to problems: sudden reboots, slow operation, overheating or sensor failure. If your Redmi begins to behave strangely, do not rush to carry it into service - in 80% of cases, the cause can be eliminated yourself.

In this article, we’ll break down the top 10 most common malfunctions on Xiaomi Redmi phones (Redmi Note 10 to Redmi 13C), their symptoms and step-by-step solutions. You’ll learn how to distinguish a software failure from a hardware failure, which settings to check first, and when to actually contact the wizard. All instructions are tested on current versions of MIUI 14/15 and HyperOS.

Special attention will be paid to the pitfalls of Xiaomi firmware: why after the update, the sound may disappear, how the background processes of com.miui.analytics eat the battery, and what to do if the phone does not see the battery SIM-For convenience, we have compiled unique diagnostic codes (e.g. ##4636## for battery test) that you won't find in standard instructions.

1.The Xiaomi Redmi phone spontaneously reboots

Sudden reboots are one of the most annoying issues, most often associated with application conflict, CPU overheating or corrupted firmware. On Redmi Note 11/12 models, this can also be caused by an error in the NFC module driver (if you have one in your version).

The first thing you need to do is to start the phone in safe mode (hold the power button → long tap on "Stop" → "Safe Mode"). If the reboots stop, it's the third-party app's fault to find it.

• 🔍 Check the latest installed programs in Settings → Annexes → Application management (sorting by date).
• 📊 Open the Settings. → Battery → Battery usage and find apps with abnormal consumption (e.g. com.facebook.katana often hangs in the background).
• 🚫 Remove suspicious apps and clear the cache through Settings → Warehouse → Clear the cache.

If the problem persists, check firmware integrity:

1. Go to Settings → About Phone → MIUI version and tap 10 times on the MIUI logo to activate the developer mode.
2. Return to Settings → Additional → For developers and enable “Debugging by USB”.
3. Connect your phone to your PC, install XiaomiTool V2, and select Check Firmware.

⚠️ Warning: If the phone reboots when charging, immediately turn it off! This is a sign of short circuit in the battery or power controller. Continued use threatens to fire.

2. Xiaomi Redmi is very warm and discharges quickly

Overheating and increased battery consumption are two sides of the same coin. On Redmi with Snapdragon 6xx/7xx processors (like Redmi Note 10 Pro or Redmi K50), this is often due to the activity of CPU cores in the background.

Models with MediaTek Helio (e.g. Redmi 9A/10A) have a bug that keeps the 4G module running even when the screen is off.

1. Go to Settings. → SIM-maps and mobile networks → Settings SIM-map.
2. Select “Preferred Network Type” → 3G (Temporary)
3. Restart the phone and return the setting back to 4G.

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If the phone is warming up when charging, use the original 18W/33W power supply and Quick Charge-enabled cable. Cheap charging can deliver unstable voltage, causing the power controller to overheat.

3. touchscreen is not working (sensor unresponsive)

Sensor failure on Xiaomi Redmi is usually associated with software failure (in 60% of cases) or physical damage to the plume (40%).If the screen responds to the presses partially (for example, only in the upper half), the problem is precisely hardware. If it does not respond at all, first try:

• 🔄 Forced reboot: Hold the power button + volume increase of 15-20 seconds.
• 🧹 Clearing the cache section: Turn off the phone. Clutch power. + Volume up to log into Recovery. Select Wipe Cache Partition (Manage volume buttons).

Equipment test

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If the sensor doesn't work after falling or getting moisture, the display plume has probably gone away. On Redmi Note 8/9 models, this is a typical problem: the plume is attached to a weak two-way tape and eventually departs. Temporary solution: gently press on the top of the screen (near the front camera) - if the sensor is working, you need to solder the plume.

⚠️ Warning: Do not use a phone with a broken sensor in Fastboot mode! this can lead to complete data loss if the process is interrupted.

4.Problems with SIM-Card: no network or only emergency calls"

Mistakes with SIM-Xiaomi Redmi cards are divided into three categories: software (failure) IMEI), hardware (slot damage) and operator (locking) to start with the simplest:

Step 1. Verification SIM-card-slot

• 📱 Extract. SIM-Check the card and check it for scuffs or cracks (especially the chip).
• 🔧 Blow the slot with compressed air (you can use a canister for the keyboard) - sometimes there accumulates dust.
• 🔄 Try inserting. SIM to another slot (if any) or to another phone.

For Snapdragon models (Redmi Note) 11/12 Pro) use QCN-file QPST, But it takes experience - it is better to contact the service.

Integrity verification SIM-map

Cleaning the dust slot

SIM test on another phone

Check IMEI via *#06#

Resetting network settings-->

5.The camera on Xiaomi Redmi doesn't focus or gives an error

Camera problems on Redmi usually boil down to three things: module contamination, software failure, or mechanical damage.

• 📸 Reboot the phone – it will reset the temporary data of the camera driver.
• 🧼 Wipe the lens with a soft lilaless cloth (don't use alcohol!).Redmi Note 10 Pro and older often accumulates fat around the sensor.
• 🔧 Clear the Camera app cache and data in Settings → Annexes.
• 🔄 Install alternative camera software, such as GCam (supports Redmi with Snapdragon).