How to Find and Analyze Errors on Xiaomi Smartphones: A Complete Guide

Xiaomi MIUI-based smartphones are some of the most popular devices on the market, but even they are not immune to system failures, application errors or hardware problems. If your Redmi, POCO or Mi started to slow down, spontaneously reboot or issue strange notifications, the first thing to do is check the error logs. Unlike iOS, where diagnostics are limited, Android allows you to deeply analyze system logs, and in this article we will show you how to do this without root rights and special knowledge.

It's important to understand that there are different kinds of errors. Some are software related (like the crash of the com.android.phone app), others are hardware related (processor overheating, Wi-Fi module malfunction). We'll look at diagnostic methods for both cases, including hidden service menus, built-in MIUI tools, and third-party utilities. If you've never worked with logs, don't worry: instructions are adapted for beginners, with explanations of each step.

Warning: Some methods require developer mode activation. This is safe, but changing hidden settings without understanding the consequences can lead to unstable operation of the device.

1. How to see Xiaomi errors through the built-in "Journals" menu

Starting with MIUI 12, the firmware has a built-in log-seeking tool called Logs, which is not as detailed as specialized utilities, but is great for basic diagnostics. Here's how to use it:

1. Open the Security app (the shield icon).
2. Go to the Application Management section → Magazines.
3. Select the System Logs tab to view critical errors or Application Logs to see specific program crashes.

On this menu you will see:

• 🔴 Critical errors (in red) – for example, a system crash (system_server) or kernel failure.
• ⚠️ Warnings (yellow) – problems with network, memory, or battery.
• ℹ️ Informational messages (gray) – routine events that usually require no attention.

If you see recurring errors with the same name (like android.process.media), it's a signal of a problem with a specific component.Copy the error name and search for a solution on Google - often this helps find the cause without in-depth diagnosis.

⚠️ Attention: B MIUI 14 and newer journals may be hidden. If you don't find a section, try searching for the settings to search for logs or use the service code method (section 3).

2.Use the engineering menu (#4636##) for diagnostics

The hidden engineering menu is a powerful tool for testing Xiaomi hardware components, available on all Android devices, but in MIUI, some sections can be blocked.

1. Launch the phone app.
2. Enter the combination: ##4636## (no call).
3. Select the "Phone Information" or "Usage Statistics" section.

In this menu, pay attention to:

• 📶 Network status: if the Service State bar indicates Out of Service, the problem with SIM-link-card.
• 🔋 Battery health: Battery health shows battery wear (value below 80% is critical).
• 🌡️ Temperature: if CPU or the battery is heated above 50°C in plain is a sign of overheating.

For a deeper diagnosis, go to the "Testing" section (if available).

• 🎵 Speakers and microphone (checking for sound distortion).
• 📸 Camera (Autofocus and Matrix Test).
• 📡 Wi-Fi/Bluetooth (connection speed and signal stability).

If the engineering menu doesn't open, it's blocked by the manufacturer, in which case use the alternative methods in the following sections.

3. Xiaomi service codes for error checking

Xiaomi uses unique service codes to diagnose hardware and software problems, and these combinations work on most models (Redmi Note 10, POCO X3, Mi 11, etc.), but some can be disabled in newer versions of MIUI.

To use the code:

1. Open the phone app.
2. Enter the combination (as a normal number).
3. Click the call button and the menu will open automatically.

⚠️ Warning: Don't enter random codes from the Internet! Some combinations (e.g. ##7780##) can reset to factory settings.

If the code doesn't work, try adding a # character at the end (e.g. ##4636###). On some models (POCO F3, Redmi K40) the service menus are blocked, in which case ADB (section 5) will help.

4. Log analysis via ADB (for power users)

Android Debug Bridge (ADB) is an advanced diagnostics tool that allows you to get full system logs in real time, including kernel errors, driver crashes and hardware problems.

What you need:

• 🖥️ Computer with Windows/macOS/Linux.
• 🔌 Cable USB Type-C (original, undamaged).
• 📦 Utilities. ADB Fastboot (download from the official Android website).

Step-by-step:

1. Turn on the developer mode on your smartphone: Go to Settings → About Phone. Tap 7 times on the MIUI Version. Go back to Settings → Additional → For Developers. Activate Debugging over USB.

Connect your smartphone to your PC and confirm access to debugging.

command-line

Terminal

adb.exe

adb logcat -d | findstr -i "error fatal warn"

This team will only display critical errors and warnings.

If you need to save the logs to the file for further analysis:

adb logcat -d > xiaomi_logs.txt

In the resulting file, look for repeating lines with:

• 🚨 E/ — Error (Error).
• ⚠️ W/ — Warnings (Warning).
• 💀 F/ — Fatal failures (Fatal).

Make sure that USB debugging is enabled

Use the original USB cable

Install Xiaomi drivers on PC (if Windows)

Do not turn off the smartphone during the collection of logs-->

If there is a lot of garbage in the logs, filter the output by keywords, for example, to find errors related to Wi-Fi:

adb logcat -d | findstr -i "wifi wlan"

5. Third-party applications for error diagnosis

If you are uncomfortable working with ADB Or embedded tools, you can use specialized applications that make log analysis easier and often offer automatic error decryption.-3 utility for Xiaomi:

1. DevCheck Hardware and System Info 📊 Shows detailed information about iron (CPU, GPU, memory). 🔍 Tests sensors (gyroscope, accelerometer, compass). 📱 Compatible with MIUI 12-14.
2. CPU Monitor 🌡️ Monitors the temperature of the processor and battery. ⚡ Shows the load on the cores in real time. 📈 Useful for diagnosing overheating.

Logcat Extreme

• 📜 Reads and filters system logs without ADB.
• 🔎 Looking for errors in keywords.
• 📤 Exports logs to file.

Warning: Some applications (e.g. AIDA64) may show incorrect battery data on Xiaomi due to MIUI limitations. Use service code ##4636## or AccuBattery for accurate battery diagnosis.

If you suspect viral activity, install Malwarebytes or Dr.Web Light, which scan the system for malicious processes that can cause errors.

💡

Before installing diagnostic apps, check reviews in Google Play – some utilities can cause crashes themselves due to aggressive work in the background.

6. How to decrypt and correct found errors

You found a bug in the logs -- what's next? Here's the algorithm.

1. Identify the type of error: If the log mentions com.android. — a problem in the system application. If you see a kernel or hardware — a malfunction of the hardware.
2. Search for a solution: Copy the error name (e.g. android.process.acore) and type it into Google along with the smartphone model. Check the XDA Developers or 4PDA forums, where specific MIUI bugs are often discussed.

General methods of correction

• 🔄 Reboot – Solves 30% of Temporary Failure Problems.
• 🧹 Cleaning the cache (in Settings) → Warehouse → Clear the cache).
• 📦 Removal of the problem application (if the error is related to com.name.applications).
• 🔧 Resetting settings (last option if nothing helps).

Examples of decoding popular errors:

• android.process.media — Media storage malfunction. Solution: Clear the data from the Media Storage app (Settings → Apps → Show Everything → Media Storage → Storage → Clear Data).
• E/WifiStateMachine: Failed to enable – a problem with the Wi-Fi module. Check the router settings or reset the network settings (Settings) → SIM-maps and networks → Resetting Wi-Fi settings).
• heat-engine: Temperature too high: Clean the device of dust, replace the heat paste (at the service center) or check the charger.

7. When to contact the service center

Not all errors can be fixed on your own, but here are some signs that your Xiaomi needs a professional diagnostic:

• 🔥 The smartphone overheats even in simple (temperature above 50).°C according to ##4636##).
• 🔋 The battery is swelling or discharged for 1-2 Check the wear and tear through AccuBattery).
• 📵 There is no Wi-Fi or network, although other devices are not connected.
• 🖥️ The screen flickers, artifacts or stripes appear.
• 🔄 The device is cyclically restarted (bootloop).

If you see errors in the logs of the type:

• Kernel panic is a critical kernel error.
• EMMCDL: SD card removal detected is a problem with internal memory.
• modem crash - failure of the communication module.

Don’t try to disassemble your smartphone yourself if you don’t have experience: Xiaomi uses fragile plumes and adhesive batteries that are easily damaged.

The cost of diagnostics in official service centers Xiaomi usually is 500-1000 rubles. If the device is warranty, repair can be free (but not always - the warranty does not cover mechanical damage or root).

💡

If the smartphone is warranty, DO NOT open it and DO NOT stitch custom recovery (TWRP) – this will void the warranty.

FAQ: Frequent questions about Xiaomi error diagnosis