Many users are faced with a situation where they need to accurately determine the technical characteristics of their device. This may be necessary when installing demanding applications, diagnosing performance problems, or simply to understand whether the configuration declared by the seller corresponds to reality.
The operating system Android provides basic information about the hardware in the standard menu, but often this data is incomplete or deliberately hidden by the manufacturer. In this guide, we will analyze all the available methods: from simple settings to the use of engineering codes and computer utilities.
Knowing the real ones tablet parameters, you can avoid problems with software compatibility and correctly assess the potential of your gadget for work or entertainment.
Standard Android system settings
The most obvious and safest way to get primary information is the built-in settings menu. The interface may differ slightly depending on the firmware version and the manufacturer's shell (for example, MIUI, OneUI or ColorOS), but the logic remains the same.
To access the main data, you need to go to the section Settings and scroll the list to the very bottom. There is usually an item About the tablet or About device. This menu displays the model, operating system version, build number and security level.
However, details about the processor and amount of RAM are often hidden here. To see them, you need to find the subsection Device characteristics or click on the item several times Build number to activate developer mode. After this, a new section will appear in the menu, where more detailed information can be indicated about hardware platform.
Also in this section you can find the device serial number and IMEI, which is critical when checking the warranty or purchasing used equipment. Do not forget that information about the free space on the internal storage is also located here, in the memory section.
⚠️ Attention: Manufacturers of budget models sometimes indicate modified data in the “About tablet” menu. The actual amount of memory may differ from that declared in the system if the firmware was changed unofficially.
If the exact amount of RAM is not indicated in the settings, try opening the multitasking menu (square navigation button) - sometimes the free amount of RAM is displayed there in real time.
Using the engineering menu and special codes
For To obtain more in-depth technical information that is not available in the usual interface, you can use service codes. They open hidden sections of the system intended for engineers and testers.
To activate this mode, open the application Phone (or Dialingif the tablet has a SIM card) and enter one of the following combinations. The most universal code for devices on chips MediaTek is ##3646633##.
After entering the code, the engineering menu will automatically open. Here you should be interested in the section Hardware Testing or similar. By going to the tab Version or Project Info, you can see the exact processor model, kernel version and other low-level data.
- 📱 Code
*#06#— instantly displays the IMEI and serial number on the screen. - 🔋 Code
##4636##—opens the testing menu, where information about the battery and usage statistics are visible. - 📊 Code
##232338##—shows the MAC address of the Wi-Fi module and the Bluetooth version.
It is worth noting that on modern versions Android (starting from 9.0 and higher), many of these codes can be blocked by the manufacturer for security reasons. In this case, the system will simply ignore the input or display an error message.
What to do if the codes do not work?
If standard USSD codes do not respond, try installing the "QuickShortcutMaker" application from the application store. It allows you to create shortcuts for hidden system activities, including engineering menus that cannot be called by code.
Third-party diagnostic applications
When built-in tools are not enough, specialized utilities come to the rescue. They read data directly from the kernel system files, providing the most accurate picture of the hardware.
One of the most popular and authoritative apps is considered CPU-Z. It provides comprehensive information about the system on a chip (SoC), including name, architecture, number of cores and the current frequency of each of them in real time.
Another powerful tool is AIDA64. This application not only shows the characteristics, but also performs processor stress tests, checks the status of the sensors and displays detailed information about the display, including its physical size and pixel density.
It is important to pay attention to the section Sensor in such applications. It will show which sensors are physically present in the tablet. Often, in cheap models, a compass or gyroscope is emulated in software, although they are not physically there, and diagnostic utilities immediately reveal this.
Checking through a computer and the ADB utility
The most professional method that allows you to get “raw” data without distortion from the interface is to use software debugging USB and computer. This method requires preliminary preparation of the device.
First you need to activate the developer mode. Go to Settings → About tablet and click 7 times on Build number. Then in the menu that appears For developers turn on the item USB debugging.
Connect the tablet to the PC with a cable. The package must be installed on the computer Android SDK Platform-Tools. Open a command line or terminal in the folder with the utility adb and enter the command to get a list of devices:
adb devicesAfter confirming the connection on the tablet screen, you can request detailed information about the system properties. The command below will display a list of all system properties, including the processor model, memory size and kernel version:
adb shell getpropTo obtain specific information, for example, about the device model, use filters:
adb shell getprop ro.product.modelThis method is essential if the tablet does not turn on normally or is in recovery mode, but the computer sees it. It allows you to diagnose problems when the screen does not work or the sensor does not respond.
⚠️ Attention: When connecting to an unfamiliar computer, always check the RSA key fingerprint that appears on the tablet screen. Never confirm debugging on other people's PCs to avoid data theft.
Analysis of display and battery characteristics
The screen and battery are the two most important components of the tablet, the condition of which directly affects the comfort of use. Display parameters are often overstated for marketing purposes, so they should be checked separately.
In applications like Device Info HW or Screen Test you can find out the real matrix resolution, screen type (IPS, OLED, TN) and supported refresh rate. Some cheap tablets interpolate the image, claiming Full HD, although the physical resolution is HD.
As for the battery, not only the mAh capacity is important, but also the health of the battery. Over time, the capacity drops, and the system may incorrectly display the remaining charge.
- 🔍 Matrix type: IPS provides better viewing angles than TN, but OLED provides deeper blacks.
- ⚡ Peak brightness: an important parameter for outdoor use, often not indicated in the specifications.
- 🔄 Refresh rate: 60 Hz - standard, 90/120 Hz - a sign of a more expensive device with smooth animation.
To check the uniformity of the backlight and the presence of dead pixels, you can run a test image of white, black and red colors on the entire screen. This will help identify defects that are not noticeable during normal use.
The real screen resolution can only be found through system files or specialized utilities that read the EDID data of the display, and not through marketing descriptions.
Table of main parameters for checking
To systematize the diagnostic process, use the following table. It will help you quickly figure out which parameter is responsible for what and where to look for it.
| Parameter | Where to look | What it affects |
|---|---|---|
| SoC model (Processor) | CPU-Z, AIDA64 | Operating speed, game support |
| Random access memory (RAM) | Settings, About Device | Number of simultaneous applications |
| Internal memory (ROM) | Storage | Space for photos, videos and apps |
| Screen resolution | Screen Test, AIDA64 | Image clarity, fonts |
| Android version | Settings → About the tablet | Compatibility with new applications |
Pay attention to the column Processor architecture. For modern applications, support for 64-bit instructions (arm64-v8a) is important. If your tablet only runs on 32-bit architecture (armeabi-v7a), many new apps simply will not install.
Also check the graphics accelerator support OpenGL ES or Vulkan. This is critical for running heavy 3D games. This information can be found in the section Device applications CPU-Z.
Frequently asked questions and diagnostic problems
Users often encounter ambiguous data when checking characteristics. Below are answers to the most popular questions that arise during the diagnostic process.
Why is the available memory less than stated?
This is a normal situation. Part of the internal storage is reserved for the system partition,_recovery_ and firmware files. In addition, manufacturers use the decimal system (1 GB = 1000 MB), and the system uses the binary system (1 GB = 1024 MB), which causes discrepancies in numbers.
Can applications from the Play Market be trusted?
Most popular utilities (CPU-Z, AIDA64, DevCheck) can be trusted because they read data from kernel system files, which are difficult to tamper with without deep intervention in the firmware (rooting). However, on frankly fake devices (NoName from China), even these apps can show false data if the build.prop file is modified.
How to find the exact release date of the tablet?
This information is rarely indicated in the standard menu. Try entering the code #197328640# (works on many devices from Samsung and other brands) and go to the version menu. Also, the production date can be deciphered by the serial number using online calculators for a specific brand.
What to do if the tablet shows the wrong number of cores?
If the system sees, for example, 8 cores, and tests show only 4 working, the power saving mode may be enabled or one processor cluster is disabled due to overheating. Check the processor settings in the engineering menu or reset the settings to factory settings.
⚠️ Attention: Characteristics obtained through third-party software on rooted devices can be changed manually by the user. When buying a used tablet, always check the data with the manufacturer's official website by serial number.
☑️ Check before buying a used tablet
A thorough check of the parameters before purchasing or using will save you time and nerves in the future. Don’t be lazy to spend 10-15 minutes on a complete diagnosis, especially if we are talking about an expensive device.