How to check the characteristics of a tablet on Android: a complete guide with hidden tricks

When buying a used tablet or trying to optimize the operation of an old device, users are often faced with the need to find out its exact characteristics. Manufacturers don't always provide complete specifications in their documents, and the Android interface hides some of the data deep in the system menus. This article will help you figure out how to check processor, RAM, Android version and other key parameters of the tablet - both using standard tools and using specialized utilities.

We will consider not only the obvious methods through device settings, but also little-known tricks: from hidden engineering menus to commands ADBthat will reveal even the data that the manufacturer chose to hide. We will pay special attention to the nuances for tablets of different brands - Samsung, Lenovo, Huawei and budget Chinese models, where standard methods may not work.

Important: some parameters (for example, the actual battery capacity or screen type) may differ from those declared by the manufacturer. In the article you will find ways to check them yourself without relying on marketing specifications.

1. Standard Android settings: what you can find out without applications

Let's start with the simplest thing - built-in Android tools. Even without additional software, you can get basic information about the tablet:

Open the menu Settings → About phone (or About tablet). Here you will see:

• 📱 Device model — exact name (for example, Samsung Galaxy Tab S6 Lite 2022)
• 🖥️ Android version — current firmware (for example, Android 13 with patch from May 2026)
• 🔋 Build number - unique firmware identifier (useful for searching for custom ROMs)
• 🔄 Kernel version - data about low-level software (for experienced users)

For more detailed information, tap several times on the item Build number - this will activate Developer modeAfter this, a new section will appear in the main settings menu For developers, where you can find out:

• 🖥️ Screen resolution in pixels (for example, 2000×1200)
• 🎮 Version OpenGL ES (important for gamers)
• 🔄 Screen refresh rate (for example, 90 Hz or 120 Hz)

⚠️ Attention: On On some tablets (especially Chinese brands), the “About phone” item may be called differently - for example, “Device information” or “System information”. If you don’t find it, use the search in the settings (magnifying glass icon in the upper right corner).

2 Hidden engineering menus: how. get data that is not in the settings

Manufacturers hide some of the technical information in special service menus. They are accessed through USSD codes or combinations of buttons. Here are the most useful ones:

Code/combination	What. shows	Works on brands
##4636##	Information about battery, network, usage statistics	Most Android devices
#0#	Display test (colors, sensor, pixels)	Samsung, Lenovo, some Xiaomi. data-i="90">Mediatek, some Chinese brands
Hold Volume+ + Nutrition when turned on	Engineering Mode (full hardware data)	Mediathek, some Chinese brands

The most informative menu opens with a code ##4636##. Here you will find:

• 🔋 Real level of battery wear (in percentage)
• 📶 Detailed information about modems and supported frequencies
• 🖥️ Data about processor (model, number of cores, current frequency)

On tablets Samsung an additional code works *#12580*369# —it shows information about sensor and screen calibrationFor devices on chips Mediatek (many budget models) useful Engineering Mode, which provides access to low-level settings of the communication module and camera.

⚠️ Attention: Do not change the parameters in the engineering menus, if you do not understand their purpose! Incorrect settings can lead to unstable operation of the tablet or loss of connection.

What to do if the code does not work?

If after entering the code nothing happens, try:

1. Add a symbol at the end (for example, ##4636## )

2. Use the "Hidden Settings" application from Google Play

3. Check if your operator is blocking service codes (relevant for tablets with a SIM card)

3. Specialized applications: top 5 utilities for in-depth diagnostics

Standard tools Android provides limited information. For a complete analysis of the characteristics, you will need third-party applications. We tested dozens of utilities and selected the best:

1. CPU-Z (free)

   Shows: processor model, number of cores, frequency, information about the GPU, sensors, battery. Feature - works without the Internet and does not collect data.

2. AIDA64 (free version with ads)

   The most detailed application: from processor temperature to information about each sensor. There are performance tests and stress tests.

3. DevCheck (free)

   User-friendly interface with data visualization. Shows the actual battery capacity (not. declared by the manufacturer).

4. AccuBattery (free)

   Specializes in the battery: shows real wear, discharge rate, charging cycle history.

5. AndroBench (free)

   Tests the read/write speed of internal memory and SD card. Useful for checking for fake flash memory.

To install, go to Google Play and enter the name of the application. After installation, provide all requested permissions - without them, utilities will not be able to collect complete data.

Example report from AIDA64 for tablet Lenovo Tab P11 Pro:

Device model: Lenovo TB-J706F
Processor: Qualcomm SM7225 (8 cores, 2x Kryo 570 @2.2GHz + 6x Kryo 570 @1.8GHz)
GPU: Adreno 620 @650 MHz
RAM: 6 GB (5.7 GB available to the system)
Memory: 128 GB (UFS 2.1)
Screen: 11.5", 2560×1600 (267 PPI), OLED
Battery: 8600 mAh (wear 8%)

Make sure that the application shows the real processor model (some Chinese tablets fake this information)

Compare the declared and real battery capacity (a difference of more than 10% is a cause for concern)

Check the memory read/write speed (on fakes it is often 2-3 times lower than stated) -->

4. Checking via ADB: for experienced users

If you need data that even specialized applications do not show. (for example motherboard serial number or bootloader information), will help Android Debug Bridge (ADB). This is a debugging tool that connects to the tablet via USB.

Connection instructions:

1. Download ADB Tools from the official Android website
2. Enable Debugging USB in the developer settings on the tablet
3. Connect the tablet to the PC and enter in the command line:

   adb devices

   (the name of your device should appear)

4. Use commands to obtain data:

   adb shell cat /proc/cpuinfo # Processor information
   adb shell cat /proc/meminfo # RAM data
   adb shell dumpsys power # Detailed information about the battery

Example command output for checking the battery:

Battery Property:
technology: Li-polymer
health: Good (2) # 2 = good condition
present: true
capacity: 8600000 μAh
voltage: 4123 mV
temperature: 32.5 C

⚠️ Attention: ADB commands require superuser rights (root) to obtain full information. On most tablets, root access is disabled by default. Attempts to obtain it may void your warranty.

5. How to check the authenticity of the specifications: recognizing the deception of manufacturers

Budget tablets (especially from AliExpress) often have inflated specifications in the specifications. Here's how to recognize deception:

Signs of a fake:

• 🔍 In CPU-Z the processor model does not match the declared one (for example, instead Helio G90T cost MT6762)
• 📉 The speed of reading/writing memory in AndroBench is 2-3 times lower than that of analogues with the same flash memory
• 🔋 The actual battery capacity is AccuBattery less than stated on the 20-30%
• 🖥️ The screen resolution in the developer settings does not match the declared one (for example, instead of Full HD — 1280×800)

To check the actual battery capacity:

1. Charge the tablet until 100%
2. Use it until it is completely discharged (before turning it off)
3. B AccuBattery look at the discharge graph - the actual capacity will be indicated in mAh

To check processor performance run the test in AIDA64 and compare the results with the reference ones for the stated model on the website NotebookCheck or GSMArena. A difference of more than 20% indicates that a different chip is installed.

6. Checking the characteristics without turning on the tablet

If the tablet does not turn on or is locked, there are ways to find out its characteristics:

By external signs:

• 🏷️ Sticker on the back cover - often contains the model, serial number, certification information
• 🔍 IMEI (on the box or under the battery) - you can use it to find out the model on sites like imei.info
• 📦 Box - usually contains the main characteristics (processor, memory, screen)

By serial number:

1. Find the serial number (on the box, receipt or sticker)
2. Enter it on the manufacturer's official website in the "Warranty check" section
3. The system will show the exact model and basic specifications

For tablets Samsung the service works Samsung Support, for Lenovo — Lenovo PC Support. websites (for example Huawei And Xiaomi similar services are available on local sites (for example, mi.com for Xiaomi).

⚠️ Attention: On some Chinese tablets, the serial number can be faked. Check it through several sources (sticker + box + receipt).

7. Comparison with the database: how to find specifications by model

If you know the exact model of the tablet, you can find full specifications in open databases. The best sources:

Resource	What is in the database	Features
GSMArena	All characteristics, tests, comparison with others models	The most complete database, but some Chinese brands are missing
NotebookCheck	Detailed reviews, performance tests, operating time	There is data on tablets and 2-in-1 devices
Kimovil	Comparison of prices, characteristics, availability in different countries	Convenient filter by parameters
Device Specifications	Technical data, historical models	There are rare and outdated devices

Search example:

1. Go to GSMArena
2. In the search bar, enter the model (for example, Samsung Galaxy Tab S8+)
3. In the "Specs" section you will see full specifications, including data about the camera, sensors, supported communication standards

For Chinese brands (for example, Teclast, Chuwi, Onda) specialized resources are useful:

• 🛒 GearBest —there are often detailed specifications in product cards
• 📦 AliExpress —search for the exact model in reviews (users often share real tests)

FAQ: Answers to frequently asked questions

How to find the actual battery capacity if the tablet is new?

Even on a new device, the actual capacity may differ from the declared one by 5-10%. For an accurate check:

1. Charge the tablet to 100% and unplug it
2. Install AccuBattery and wait for the full discharge cycle
3. In the "Health" section, the application will show the actual capacity

Normal deviation - up to 5%. If the difference is more than 15%, this is a reason for a return under warranty.

Is it possible to check the characteristics of the tablet through a computer without turning it on?

Yes, if the tablet is detected by the computer as external. Connect the device via USB and:

• In Device Manager (Windows) look at the name in the "Portable Devices" section
• Use the utility USBDeview - it will show the serial number and model of the controller
• For Linux, the command is suitable lsusb in the terminal

This data will help identify the model and find its specifications on the Internet.

Why does CPU-Z show a different processor than what is written in the specifications?

This is a sign of deception. Most often found in budget Chinese tablets, where:

• Instead Helio G90T is MT6765 (2 times weaker)
• Instead Snapdragon 660 — Snapdragon 450
• Instead of 4 GB of RAM - 2 or 3 GB

It is difficult to return such a tablet under warranty - manufacturers often fake stickers with characteristics. It is better to buy devices in official stores.

How to check the supported 4G/LTE frequencies on the tablet?

For this:

1. Install the application Network Signal Guru
2. Go to the "Band Support" section
3. The application will show all supported bands (for example, B1, B3, B7, B20)

Alternative - code ##4636## →"Phone information." In In the "Set preferred network type" section there will be available communication standards.

Is it possible to find out all the characteristics of a tablet by IMEI?

IMEI provides limited information - usually only the model and production date. To get full specifications:

1. Find out the model by IMEI on the website imei.info
2. With the model you find, look for specifications on GSMArena or NotebookCheck

IMEI does not show data about the processor, memory or screen - only basic information to identify the device.