In the depths of the settings of each smartphone based on the Android operating system, technical information is hidden that often goes unnoticed by the average user. However, for enthusiasts, developers and those who want to better understand their device, kernel version is one of the key parameters. It is the kernel (Linux Kernel) that acts as the link between the gadget’s hardware and the software interface that you see on the screen.
Many people confuse the operating system build number, Android version and kernel version, believing that they are the same thing. This is a common misconception that can lead to errors when trying to flash a device or install a custom recovery. Understanding the difference between these concepts is critical when it comes to root accessmodifying a system or diagnosing hardware problems.
In this article, we will look in detail at where to look for this information, how to interpret it correctly, and why knowing the kernel number can save your smartphone from becoming a “brick” when installing updates. We will look at both standard methods through the settings menu, as well as more advanced methods for technically trained users.
Differences between the Android version, build and kernel
Before moving on to searching for technical data, it is necessary to clearly differentiate the terminology. The Android operating system is a complex software package consisting of several layers. Android version (for example, 12, 13 or 14) indicates the API level and interface and application functions available to the user. This is what the end consumer sees.
In turn, build number (Build Number) is a unique identifier of a specific system image released by the manufacturer for your model. It can change even within the same version of Android, for example, when monthly security patches are released. But Linux kernel is the foundation, a low-level component that manages memory, processes and hardware drivers.
⚠️ Attention: When searching for firmware or instructions for unlocking the bootloader, always focus on the kernel version and processor model, and not just on Android version. A kernel mismatch can lead to the communication modules or camera not working.
It often happens that two different smartphones with the same version of Android (say, Android 11) have completely different versions of the kernel installed. This depends on the processor manufacturer (Snapdragon, MediaTek, Exynos) and the vendor's policy. The kernel adapts to specific hardware, so there are no universal solutions here.
Standard method of checking through the settings menu
The simplest and safest method of obtaining information about the system does not require installing additional software or connecting to a computer. All the necessary data is already contained in the system menu of your device. First, open the application Settings on your smartphone or tablet.
Next, the algorithm of actions may differ slightly depending on the manufacturer's shell (MIUI, OneUI, ColorOS, etc.). Usually you need to go to the About phone or Systemsection. There you will find basic information, but to see the details, you often need to click several times on the item Version MIUI or Build number, although in pure Android the necessary information is often visible immediately.
☑️ Information search algorithm
The string you are looking for is called - Kernel version (Kernel Version). Next to it is usually the version number (for example, 4.19.113) and the compilation date. It is this date that shows when the kernel image used was built, which can be useful for determining the relevance of low-level security patches.
If you cannot find this line in the main "About phone" menu, try going to the Information about the softwaresection. In some shells from Samsung or Xiaomi the information is hidden there. It is also worth paying attention to the line “Version information”, where the data can be presented in a more compact form.
Using the engineering menu and codes
For deeper diagnostics, Android provides access to the engineering menu, hidden from the eyes of the average user. This interface contains detailed statistics on all device modules. To get there, you can use special USSD codes, although on modern versions of Android (starting from 9 and higher), many of them are blocked by manufacturers for security reasons.
Try entering the combination ##4636##in the dialer (call application). If the code is supported by your firmware, the testing menu will open. There you need to select item Phone information or Phone information. However, it is worth noting that the kernel version is not always displayed in this menu; more often you can see the IMEI and network type there.
##4636##
#0#
##7780##A more reliable way for some brands is to use specific codes. For example, for devices based on processors MediaTek the code ##3646633##often works, which opens the full engineering menu. The Version or MTK Settings tab will provide comprehensive information about the kernel, drivers and version of basic radio modulation.
What to do if the codes do not work?
If entering the codes does not lead to any result, then your firmware manufacturer has blocked access to the engineering menu through dialer This is standard practice for devices sold in Europe and the US, as well as for many Chinese versions with global firmware. In this case, you can only rely on the settings menu or third-party applications.
Checking the kernel version via ADB and a computer
If you have access to a computer and USB debugging is enabled, you can get the most accurate information directly from the system, bypassing the graphical interface. This method is especially useful if the smartphone screen is damaged or the system is unstable, but the ADB connection remains. You will need to install the package Android SDK Platform Tools.
Connect the device to the PC and enter the command adb shellin the command line. After gaining access to the device shell, enter the command uname -a. It will print a full line of kernel information, including hostname, compiler version, and processor architecture. This is the most technically reliable source of data.
adb shell uname -a
adb shell cat /proc/version
An alternative way is to use the command cat /proc/version. It will show not only the kernel version, but also the string that the system uses for identification when building. This is useful if you are comparing stock firmware with custom firmware. Differences in the version string may indicate the presence of patches from community developers, such as LineageOS or Pixel Experience.
⚠️ Attention: For the ADB method to work, you must first activate developer mode and enable the "USB Debugging" option. Without this, the computer will not be able to establish a connection with the device, and commands will not be executed.
Third-party diagnostic applications
When the built-in tools are not enough or more convenient visualization is required, specialized applications from Google Play come to the rescue. They collect data from system files and present it in a readable form. One of the most popular and time-tested tools is the application CPU-Z or AIDA64.
After installing such an application, for example Device Info HW, you just need to launch it. The kernel version will be indicated on the main screen or in the tab System . The advantage of such apps is that they also show core temperature, processor frequency in real time and memory load, which gives a comprehensive picture of the device’s state.
| Application | Size | Presence of advertising | Detailing |
|---|---|---|---|
| CPU-Z | ~5 MB | Minimum | High |
| AIDA64 | ~10 MB | No | Maximum |
| Device Info HW | ~3 MB | Yes | Average |
| Terminal Emulator | ~1 MB | No | Technical |