Owners of devices running MIUI shells or the new HyperOS often face the need for deep diagnostics, and the concept of “system tracing” in the context of mobile gadgets usually involves enabling debugging over USB, logging processes, or accessing engineering menus, which allow technicians and advanced users to track components in real time.
The standard Android interface hides these features from the eyes of the average user to prevent accidental software damage. However, knowing the exact path, you can activate the necessary diagnostic modes, which is especially true when developing applications or looking for causes of unstable device operation.
It is important to understand that activating system tracing is not just a switching of the toggle in settings. Access to kernel logs and system tracing often requires superuser rights (Root) or the use of specialized ADB tools. Without appropriate knowledge, interference with these processes can lead to instability.
Activation of the developer mode on the MIUI shell
Before looking for hidden trace options, you need to unlock access to advanced settings. In the Xiaomi ecosystem, this step is a mandatory security filter. The standard path to the developer menu is closed until you complete a series of special actions.
To start, go to the basic settings of your smartphone. Find the About section and click on the operating system version seven times in a row. After that, a notification will appear that the developer mode is activated. Now a new item will appear in the "Additional" menu.
Inside the developer menu, there are key debugging tools, and that's where the USB Debugging switch is, which is the first step to accessing the system logs, and without it activating, the computer won't be able to see the device in debugging mode.
⚠️ Note: Do not turn on the “Debugging by” option USB» When connected to public charging stations, this can make your smartphone vulnerable to data interception.
The main path to system tracing
Once the developer mode is activated, basic monitoring functions are accessed. However, the classic “tracing” in the engineers’ understanding is often hidden deeper.
You'll need to go to Settings → Settings → Developers. You'll need to look at the Debugging section, and that's where you hide the settings that allow the system to transmit data about its work to the external interfaces.
Full traceability often requires the option “Select a debugging app” to be enabled, and by installing a tool (like an ADB or a dedicated analyzer) you can intercept system calls, which is critical for analyzing the causes of failure.
Some Redmi and Poco models may have slightly altered menu structure. If you don't find the right item, try searching by settings by typing in "debugging" or "developer," and the system will show you the path to the hidden partition.
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Use a Settings Search by entering the word “USB” to find the debugging menu faster if the standard path is changed in your firmware version.
Using the Engineering Menu for Diagnostics
A deeper layer of tracing is available through the engineering menu, a hidden interface designed to test hardware modules and network protocols, accessed through a special code in the Phone app.
Dial ##6484## or ##4636##. If the code fits your model, the test menu will open, and you can see detailed information about battery status, Wi-Fi network and cellular connectivity, which is sort of an X-ray of the system.
Phone Information often provides logs of network activity, and you can watch the switching between towers, signal strength and connection type in real time, which is useful in diagnosing mobile Internet problems.
What if the code doesn't work?
It's worth noting that the engineering menu doesn't allow logging to be written directly into a file, it's for visual control of parameters, and it still requires a PC connection to record the trace.
Working with ADB and logging through a computer
True tracing is impossible without the use of the Android Debug Bridge (ADB) toolkit, which is a bridge between the computer and the smartphone, allowing you to send commands directly to the operating system, and it is through ADB that you can unload the full log of the system.
To get started, install the SDK Platform Tools on your computer. Connect your smartphone with a cable and type in a command to check the connection. If everything is set up correctly, you'll see the serial number of the device in the list of connected devices.
To start the log log log record, the following command is used:
adb logcat -v time > system_log.txtThis command will start recording all system events in a file. system_log.txt You'll see the text that describes how each process is running updated in real time, and that's the "tracing" in action.
☑️ Preparation for ADB-debugging
⚠️ Note: The log file can grow very quickly, filling up the memory.+C immediately after the error is reproduced.
Tracing analysis and error search
The resulting log file is a huge amount of text, and it's hard to find the information you need without preparation. System tracing contains records of everything from touching the screen to operating background services.
Use keywords to analyze, and if you're interested in an app crash, look for the word "FATAL," "Exception," or "Crash." These tags indicate critical errors that led to a process stoppage, and they're usually highlighted in red on the console.
You also need to look at timestamps, so by matching the time of the problem with the time in the log, you can cut off the extra information, and this helps isolate the specific module of the system that caused the failure.
There are specialized analysis programs that visualize ADB logs. They build load graphs and show chains of function calls. For beginners, this may be a more understandable way to learn tracing than reading raw text.
| Parameter | Description | Importance for diagnosis |
|---|---|---|
| PID | Process identifier | Allows you to track a specific application |
| TID | Flow identifier | Important for multithreaded failures |
| Priority | Priority of communication | Indicates the importance of an event (Error, Warn, Info) |
| Tag | Source tag | Name of the module issuing the message |
Safety and Risks in Including Tracing
Using trace tools carries certain risks. Open debugging port and active logging can reduce the performance of the device, the processor will be busy writing data, which will lead to heating and rapid discharge of the battery.
In addition, the logs may contain confidential information, and at the time of tracing, passwords, authorization tokens or private messages may enter the file, if they are processed by the system at this time, so you should store such files with caution.
It is not recommended to leave debugging mode on permanently. Once the diagnostic procedures are complete, be sure to turn off USB debugging**.This will close a potential loophole for malicious users who have gained physical access to your device.
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Always disable debugging over USB after use to protect personal data from unauthorized access when connecting to someone else's PC.
If you are not sure about your actions, it is better to limit yourself to standard diagnostic tools built into the MIUI shell.