Every smartphone user sooner or later faces with the need to find out the exact characteristics of your device. Most often, this question arises when buying a gadget secondhand, comparing models before purchasing, or diagnosing performance problems.
Visually determining how many gigabytes RAM (RAM) are installed in the phone is impossible. The cases of modern smartphones are non-separable, and stickers under the battery are a thing of the past. Fortunately, the operating system Android provides many ways to obtain this information, from simple settings to advanced console commands.
In this material we will analyze all the available methods: from the standard menu for beginners to use engineering code and USB debugging for experts. You will learn to distinguish the physical amount of memory from the one available to the user and understand why indicators in different menus may differ.
Standard system settings
The most obvious and safest way to find out the volume RAM is to look into the settings of the smartphone itself. The interface may differ slightly depending on the manufacturer's shell (MIUI, OneUI, ColorOS), but the logic remains the same.
Usually the information is hidden in the “About phone” or “System” section. Manufacturers often hide technical details so as not to overload the interface, so sometimes you need to click several times on the build version or model name.
In the clear Android the path looks like this:
Settings → About phone → Device characteristics.
The total amount of memory will be indicated here. However, in some custom firmware this line may be missing, showing only the space for storing files.
⚠️ Attention: If only the amount of internal memory (ROM) is indicated in the settings, and the line about RAM is missing, this does not mean that the phone does not have RAM. Most likely, the manufacturer simply hid this information in the standard menu.
For owners of devices based on chipsets MediaTek or Qualcomm sometimes it helps to enter the extended information menu. Try to find the “General Information” or “Status” item, where information about hardware is often duplicated.
Using diagnostic applications
If the standard settings are not give a complete picture, specialized utilities from the store come to the rescue Google Play. These applications read data directly from the kernel system files, providing the most accurate information.
The most popular and reliable tool is considered CPU-Z. After installation, just open the tab Device or System. The app will show not only the total volume RAM, but also the type of memory (for example, LPDDR4X), as well as the current load in real time.
- 📱 CPU-Z: shows detailed information about the processor, sensors and memory.
- 📊 AIDA64: a powerful all-in-one tool for diagnostics, displays temperature and voltage.
- 🔋 DevCheck: a convenient utility with a beautiful interface for monitoring the system.
Another great option is the application Android Info HW. It can even show those parameters that are hidden from other apps, including the frequency of the memory controller. This is useful when choosing a smartphone for games where bandwidth is important data channel.
When installing diagnostic applications, pay attention to permissions. To read system characteristics, you usually do not need access to contacts or geolocation.
The advantage of third-party apps is that they show the “honest” amount of memory that the system core sees, without marketing attributions. If the application shows 3.7 GB instead of the stated 4 GB, this is normal: part of the memory is reserved by the system for equipment operation.
Engineering menu and service codes
For a deeper check, you can use service codes that open the hidden engineering menu. This method does not require the installation of additional software, but does not work on all devices due to differences in firmware.
To get to the menu, open the “Phone” application and enter a special combination of numbers. For most smartphones with processors MediaTek the code ##4636##is suitable. After entering the last character, the menu will open automatically.
In the window that opens, select the item Information about the phone or Statistics. Here you will find detailed resource usage statistics. Look for the line Total RAMthat will indicate the physical amount of installed memory in bytes or megabytes.
⚠️ Attention: The engineering menu has sections for setting up radio modules and testing sensors. Do not change values in fields whose purpose you do not know, so as not to disrupt the operation of communications or sensors.
For devices Samsung there is often a code running #0#that runs an advanced hardware test. Although it is more focused on checking the screen and buttons, in some versions of the firmware there is a tab with information about configurations system.
What to do if the code does not work?
If nothing happens after entering the code, then the manufacturer has blocked access to the engineering menu in your firmware version. In this case, use diagnostic applications or methods with ADB.
Checking via a computer and ADB
The most professional way to guarantee 100% accuracy is to use the debug bridge ADB (Android Debug Bridge). This method requires connecting the smartphone to the computer via a USB cable and having the driver installed.
First you need to activate developer mode. Go to Settings → About phone and quickly click 7 times on the “Build number” item. After this, a new section “For Developers” will appear in the settings menu, where you need to enable the item USB debugging.
Connect the phone to the PC, open the command line (Terminal or CMD) and enter the following command to check the memory:
adb shell cat /proc/meminfoB in the command output, find the line MemTotal. The value will be indicated in kilobytes. Dividing it by 1024 gives you the size in megabytes, and dividing it again by 1024 gives you gigabytes. This value is the most reliable, since it is read directly from the kernel Linux.
- 💻 The installed package is required Platform Tools on the computer.
- 🔌 A high-quality USB connection is required for stable data transfer.
- 🔐 Debugging confirmation is required on the smartphone screen the first time you connect.
This method also allows you to see how much memory is available to applications and how much is occupied by the core and graphics buffer. The difference between MemTotal and the memory available to the user is explained by the architecture of mobile processors.
☑️ Preparing for testing via ADB
Specifics of virtual memory and RAM Plus
In modern smartphones In the middle and budget segment, manufacturers are actively introducing RAM expansion technology. It is known under different names: RAM Plus y Samsung, Memory Extension y Xiaomi or Virtual RAM other brands.
The essence of the technology is to use part of the fast built-in storage (eMMC or UFS) as a swap file. When the physical RAM fills up, the system dumps inactive data into this virtual partition, freeing up space for active tasks.
| Memory type | Working speed | Purpose | Impact on the system |
|---|---|---|---|
| Physical RAM (LPDDR4/5) | High (up to 40+ GB/s) | Running applications, games | Critical for performance |
| Virtual (from ROM) | Low (up to 1-2 GB/s) | Storing background processes | Helps to keep more applications in background |
In the settings you can often choose the amount of expandable memory: 2, 4 or even 8 GB. However, it is important to understand that this does not turn the phone into a flagship. The speed of working with the swap file is significantly lower than with a real memory chip.
⚠️ Attention: Constant active writing to virtual memory can theoretically speed up the wear and tear of a smartphone's drive, although modern controllers UFS have a large margin of safety.
Virtual memory does not increase performance in games or heavy tasks, it only allows the system not to close background applications so aggressively.
Why is the available memory less than stated
Users are often surprised to find that when buying a phone with 6 GB of memory, only 3.5–4 GB is free in the system. This is not a deception of the manufacturer or a device defect, but a feature of the architecture of mobile operating systems.
Part of the physical memory is allocated for the needs of the system kernel, hardware drivers and, most importantly, for video memory. Smartphones do not have a separate video adapter with its own memory, so the graphics chip takes part of the total RAM to process the image.
The amount of reserved memory depends on the screen resolution and GPU power. The higher the display resolution (for example 2K or 4K), the more buffers the video processor requires, and the less memory remains available to the user.
In addition, manufacturers can reserve memory for artificial intelligence functions or modem signal processing. These processes operate at a low level and are not displayed in the task manager like normal applications.
If your phone starts to slow down when there is 20-30% of free memory, the problem is most likely not in the amount of RAM, but in an overheating processor or a slow drive.
Why do different applications show different memory numbers?
Different utilities use different methods for requesting data from the system kernel. Some show the physical volume of the chip, others show the volume available to the user (User Available), and others take into account virtual expansion. The most accurate value is considered to be /proc/meminfo.
Is it possible to increase physical RAM on Android?
No, physical memory cannot be increased. The microcircuits are soldered directly onto the motherboard. Any application that promises to “increase RAM” actually only sets up the page file or clears the cache, which gives a temporary effect.
Does the amount of RAM affect battery life?
Yes, it does. More memory allows the system to unload applications from the background less often, which saves energy on launching them again. However, the process of holding data in memory cells also consumes charge, although insignificantly compared to the screen and processor.
What are MemTotal and MemFree in ADB output?
MemTotal is the total physical amount of installed memory. MemFree is memory that is not used by anyone at the moment. In Android, the system tries to keep memory occupied by the cache for performance, so a low indicator MemFree with a high MemAvailable is the norm.