Xiaomi Mistakes: How to Find and Fix Phone Troubleshooting Yourself

Xiaomi smartphones are known for their value for money, but even they are not immune to software failures and hardware problems. Errors can manifest themselves in various ways, from sudden reboots to complete camera failure or lack of network. Most problems are solved without going to the service center — just know where to look for the cause and how to act.

This article will help you understand the typical errors Xiaomi (including the Redmi models, POCO And Black Shark, their symptoms and their ways of dealing with them, and we'll look at them as software bugs. MIUI, And there's hardware malfunctions, and there's also a prevention recommendation, and if your phone suddenly stops turning on, it doesn't see. SIM-card or gives an error com.android.phone – here you will find a solution.

Important: Before you start your diagnosis, check if the problem is related to the latest update. MIUI. Often failures occur after an automatic update - in this case, a rollback or resetting of settings will help.

1. Diagnostics of an error: how to determine the cause of a failure

The first step is to determine whether the problem is software or hardware, and that will determine what to do next.

• 🔄 Programming errors: the phone turns on, but glitch (lags, application departures, errors such as android.process.media), the screen flashes, the touchscreen does not work partially.
• 🛠️ Hardware malfunctions: the device does not turn on at all, does not respond to charging, overheats, the camera gives out artifacts, the speaker wheezes.
• 📶 Network problems: no mobile Internet, no Wi-Fi, SIM-The card is not determined (error number) SIM or insert SIM).

For accurate diagnosis, use the built-in tools Xiaomi:

1. Open the Settings. → The phone. → Diagnosis (on some models the path: Settings) → Additionally. → Diagnostics of the system).
2. Run tests of hardware components (screen, camera, speakers, sensors).
3. Check the error log in Settings → The phone. → Book of errors MIUI (Developer mode must be activated).

If the diagnosis did not give results, try the safe mode:

1. Press the power button before the off menu appears.
2. Press and hold the "Switch off" item - a suggestion will appear to go to safe mode.
3. This mode only runs system applications, and if the error is gone, it's the fault of third-party software.

⚠️ Warning: If the phone doesn’t respond to buttons and doesn’t turn on even after a long Power hold + Volume Up, don't try to disassemble it yourself. It could be a board or battery malfunction - professional diagnosis is required.

2. Common errors MIUI and their decisions

Operating envelope MIUI — It's one of the most customized, but also the most problematic:

If errors occur after the update MIUI, try to roll back:

1. Download the old firmware version for your model from the official Xiaomi website.
2. Rename the file to update.zip and place it in the phone’s root folder.
3. Hold Volume Up + Power, choose Install. update.zip.

Clear the app cache through Settings

Restart your phone in safe mode

Check for MIUI updates

Reset the settings to factory (if nothing helps)-->

Critical information: On Xiaomi models with a locked bootloader (most devices purchased officially), a firmware rollback can lead to a Bootloop block. Before rolling back, check the bootloader status with the fastboot oem device-info command - if Device unlocked: false, you should not risk it.

3. Network problems: Wi-Fi, mobile Internet, SIM-map

Communication errors are among the most common, and can be caused by software failures or hardware failures (such as damage to an antenna or slot). SIM). Let's look at the typical cases:

• 📶 No Service, Only Emergency Calls (No Service):
• 🔌 Wi-Fi is not connected or permanently shut down:

If SIM-The card is not defined at all (Insert error) SIM), try:

1. Wipe your contacts. SIM-cards and slots with alcohol (sometimes oxidation interferes with contact).
2. Insert SIM to another phone – if it doesn’t work there, the problem is in the card, not the device.
3. Update the Baseband Module firmware (if available for your model).

On models POCO X3, Redmi Note 10 and Newer Sometimes Helps Reset IMEI (If it's gone after the firmware:

1. Please dial the phone application ##4636##.
2. Select Phone Information and scroll down to Testing Options.
3. Press Update. IMEI (if the option is available).

4. Hardware malfunctions: what can be fixed by yourself

Not all hardware problems require a service center visit, and some problems can be repaired by yourself if you act carefully.

• 🔋 Phone doesn't turn on or discharges quickly: Check the charger and cable (use the original or Xiaomi certified). Connect the phone to charge for 30 minutes - sometimes the battery is drained to a level where the device doesn't respond immediately. If the charging indicator is not on, try to pinch the Power + Volume Down for 10-15 seconds (forced reboot).
• 📸 The camera doesn't focus or gives a blurry image: Clean the lens with a soft napkin (don't use alcohol or abrasives!). Check if the lens is covered with a protective film or case. Reset the camera settings: Settings → Annexes → Camera. → Warehouse → Clear the data.

If the phone overheats (especially when charging or playing games), the reasons may be as follows:

• Pollution of the charging connector or vents (relevant to Black Shark and other gaming models).
• Failure of the battery (blown, loss of capacity).
• Background processes or viruses (check in Settings) → Battery → Battery utilization).

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If the phone doesn't turn on after falling or getting moisture, DO NOT plug it into charging! this can cause a short circuit.Let the device dry in rice or silica gel for at least 24 hours, then try turning it on.

For models with removable battery (for example, Redmi) 4X, Redmi Note 4 can be used for a try:

1. Remove the battery for 1-2 minutes, then insert back.
2. Check the contacts of the battery for oxidation (clean with alcohol if necessary).

⚠️ Warning: If after a fall, the phone creaks when pressed on the screen or colored stripes appear, this is a sign of damage to the plume or matrix. Self-repair in this case can worsen the situation (for example, detachment of the touch screen).

5. Errors after firmware or update

Failed update MIUI Or custom firmware can lead to bootloop, network failure, or other critical failures:

• 🔄 Bootloop (phone boots to logo and reboots): Try logging into Recovery (click Power) + Volume Up when you turn on. Select Wipe Data/Factory Reset (reset to factory settings). If it doesn't work, run your phone through Fastboot (instruction below).
• 📱 After the update, features (such as Always-on Display or gestures) are gone: Check if the settings in Settings are lost → Additionally. → Special features. Update Settings and Launcher apps via Google Play.

For Fastboot Firmware (if the phone doesn't boot):

1. Download the official firmware for your model (choose the Fastboot version).
2. Unpack the archive in a folder on your PC.
3. Connect your phone to your computer in Fastboot mode (press the Power) + Volume Down).
4. Launch the file. flash_all.bat (for Windows or flash_all.sh (for macOS/Linux).

If the firmware is interrupted and the phone becomes a “hard brick”, you will need to EDL-The Emergency Download Mode (ED) is the mode for this:

1. Download Mi Flash Tool and firmware in.tgz format.
2. Connect your phone to your PC by holding Volume Up + Volume Down (on some models you need to close test points on the board).
3. In the Mi Flash Tool, select firmware and press Refresh, then Flash.

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Firmware through EDL If the phone was purchased unofficially or tied to another region, it may be necessary to unlock the bootloader (the procedure takes up to 72 hours).

6. Resetting: When it is the only solution

If none of the methods worked, you'll have to have a hard reset, which will delete all the data from your phone, so first you have to:

• Make a backup through Settings → System → Backup.
• Save photos and files to your PC or cloud (Google Drive, Mi Cloud).
• Write down the account data (logins, passwords), as after reset, you will need to re-authorize.

Resetting methods:

After discharge:

1. The phone will reboot and offer to configure as new.
2. Do not restore data from the backup immediately – first check if the error has disappeared.
3. If the problem persists, it is likely hardware.

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On models with Mi Account, you may need to enter a linked account after a reset. If you forget your password, restore it in advance on the Xiaomi website.

7.Error prevention: how to avoid problems in the future

Many Xiaomi crashes can be prevented by following simple rules:

• 🔄 Updates: Install updates MIUI Only through official channels (do not use custom firmware unless you are sure of its stability, 4PDA) — Sometimes new versions contain critical bugs.
• 🛡️ Security: Do not install applications from unknown sources (risk of viruses that can damage system files). → Warehouse → Cleanup.
• 🔋 Battery: Avoid full discharge and overheating (do not play heavy games while charging). Use original chargers - cheap analogues can disable the power controller.

To extend the life of the phone:

• Every 3-6 months, calibrate the battery: completely discharge the phone, then charge to 100% without interruptions.
• Do not store your phone in the cold or in direct sunlight (optimum temperature: 10-35).°C).
• If you don't use the second one. SIM-With a card or microSD slot, close it with a plug – this will prevent dust from getting in.

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In the models with AMOLED-screen (e.g. Xiaomi) 11T, POCO F4) avoid prolonged display of static elements (for example, wallpaper with logos) - this leads to burn-in matrix).

8.When to contact the service center

Not all problems can be solved by yourself. Contact the service if:

• The phone does not turn on even after the firmware is through EDL.
• Vertical/horizontal bands or broken pixels appeared on the screen.
• The battery is swollen (this can be seen by the raised back cover or screen).
• The phone overheats without loading (may indicate a faulty processor or board).
• The microphone or speaker is not working (the problem may be in the plume or audio codec).

Xiaomi’s official service centers in Russia and the CIS can be found on the Mi Service website.

1. Make a backup copy of the data (if the phone is still turned on).
2. Check the cost of repairs – sometimes it’s cheaper to buy a new phone than to fix an old one (for example, replacing a matrix with a Xiaomi 12 can cost up to 70% of the price of the device).
3. If the phone is warranty, do not open it yourself - this will cancel the warranty obligations.

The cost of standard repairs (approximately, for models 2020-2023):

⚠️ Note: Unofficial services may use non-original parts (e.g., screens with the worst color reproduction or batteries of lower capacity). Always ask for a warranty for replacement parts.

FAQ: Frequent questions about Xiaomi errors