Modern mobile applications are becoming increasingly demanding on device resources, and RAM (RAM) is one of the key factors that determine the performance of your smartphone. When the gadget starts to slow down when switching between tasks or games crash a few minutes after launch, the first thing the user asks is the amount of RAM available. Understanding how many gigabytes are available to the system helps not only in diagnosing problems, but also when choosing a new device.
Unlike computers, where you can simply open the case and look at the memory sticker, in mobile devices the information is hidden deep in the software. However, the operating system Android provides enough tools to obtain this data. There are several methods: from standard settings menus available to everyone, to using the command line and specialized software for in-depth diagnostics.
In this article we will analyze all the current methods of checking, explain the difference between physical and virtual memory, and also answer the question why the volume declared by the manufacturer may differ from what the user sees. The actual available capacity is always less than the physical one due to reserved system processes. Let's take a look at how to get accurate data about your device.
Using standard Android settings
The easiest and safest way to find out the characteristics of the device is to refer to the built-in settings menu. However, the interface Android varies greatly depending on the manufacturer and version of the shell. In “pure” Android (used in smartphones Google Pixel, Nokia, Motorola) the path usually lies through the “About phone” section. Basic information is displayed here, but RAM details may be hidden.
Owners of devices with shells MIUI (Xiaomi, Redmi, POCO), One UI (Samsung) or ColorOS (Oppo, Realme) are luckier. Manufacturers often display the amount of memory directly on the main screen of the “About phone” menu or in the “Advanced settings” subsection. If you see a line like "4 GB / 6 GB", this means that 4 GB is occupied by the system right now, and 6 GB is the total physical capacity.
In some cases, especially on older versions Android or trimmed firmware, detailed information may be hidden in the "For Developers" menu. To activate this section, you need to quickly click on “Build number” 7 times in the “About phone” menu. After activation, a new item will appear in the system settings, where you can often find detailed statistics on resource use.
⚠️ Attention: The settings menu interface may differ depending on the firmware version and regional binding of the device. If you do not find the item you need, try using the settings search by entering the word “Memory” or “RAM.”
The following sequence is often used to navigate to the desired parameters: Settings → About the phone → All specifications. In newer versions Android 12-14 the path may look like Settings → System → About the system → More about the phone. It is important to carefully study all sub-items, as manufacturers like to hide technical data.
Checking through the engineering menu and encoding
For more advanced users, there is access to hidden system menus through special USSD codes or commands in the “Phone” application. This method allows you to access technical information that is not displayed in the normal interface. The codes are entered in the dialing application, as when making a call, but you do not need to make a call - the menu will open automatically.
One of the most common codes is ##4636##. After entering the last character (asterisk), the Testing menu should open. Here you need to select “Device Information”. In the list that opens, you can find the line “Memory”, which will show the current state of the RAM. Note that on some modern smartphones, especially with new versions Android, this code may be blocked by the manufacturer.
There are other brand-specific codes. For example, for devices Samsung the code #0#often works, opening the testing menu, where in the section RAM you can see the free volume. For Xiaomi sometimes a code ##6484##that launches the CIT engineering menu is useful. However, you should not rely on them as the main source of information, since they often show only free memory, and not the total volume.
Why codes may not work?
On modern versions of Android (starting from 9-10 and higher), Google has limited access to engineering menus through USSD codes for security purposes. Therefore, on new smartphones, these combinations may simply do nothing or give an error.
If the standard codes do not work, you can try the universal method through the debugging settings. Enable Developer Mode (as described in the previous section), then look for Running Services. It shows how much memory running applications are using and how much is available. This is an indirect but reliable way to find out the volume.
Third-party applications for diagnostics
When built-in tools are not enough or the information seems incomplete, specialized applications from Google Play Marketcome to the rescue. These snails read data directly from the kernel system files, providing the most accurate information about hardware configuration. They show not only the total volume, but also the type of memory, frequency and number of occupied slots (if it is technically possible to determine this).
The most popular and authoritative tool is considered CPU-Z. This application has long established itself as a standard for checking the characteristics of PCs and mobile devices. After launch, you need to go to the “Device” tab, where the exact amount of RAM will be indicated in the “Total Memory” line. The application will also show how many memory channels are used and what its frequency is.
Other useful utilities include AIDA64, DevCheck and AnTuTu Benchmark. AIDA64 provides perhaps the most detailed information, breaking the memory into blocks and showing the load on each processor core. DevCheck is convenient with its minimalistic interface, where all RAM data is displayed on the main screen of the “Device” tab.
- 📱 CPU-Z —a classic choice for quickly checking the main parameters of the processor and memory.
- 📊 AIDA64 —deep diagnostics showing temperature, voltage and detailed memory structure.
- 🚀 DevCheck —convenient real-time monitoring with widgets for the desktop.
- 🛠️ System Info is a simple application that displays “dry” technical characteristics without unnecessary graphics.
It is important to understand that third-party applications require certain permissions to access system information. When installing, be sure to read the list of rights that the app requests. Although popular utilities are safe, downloading little-known “memory optimizers” can lead to the installation of adware.
Use only trusted applications with many reviews, such as CPU-Z or AIDA64. Avoid dubious “accelerators” that promise to increase memory programmatically - this is impossible.
Using computer apps and ADB
For users who prefer to work with a PC, it is possible to connect a smartphone via USB and receive a detailed report via a computer. This method is especially useful if the phone screen is broken or the sensor is not responding, but the system is working. The main tool here is the platform Android Debug Bridge (ADB).
First, you need to enable USB debugging in the “For Developers” menu on your phone and install ADB drivers on your computer. After connecting the cable and confirming debugging on the smartphone screen, you can run the command on the computer command line. Enter the command adb shell cat /proc/meminfo. It will display a list of all memory parameters, where the line MemTotal indicates the total volume in kilobytes.
adb shell cat /proc/meminfoAn alternative way is to use graphical shells for ADB, such as Android Screencast or specialized apps for firmware like SP Flash Tool (for MediaTek processors). In the SP Flash Tool, if you load your model's scatter file, you can see the device's memory map, including the addressing and capacity of each chip.
This method is considered the most technically accurate, since it accesses directly the file system of the Linux kernel on which it is based. Android. However, for the average user it may seem complicated due to the need to install drivers and work with the command line.
☑️ Preparing to work with ADB
Understanding memory types and virtual expansion
In the specifications of modern smartphones you can often find strange designations, for example, “8+4 GB” or “12+4 GB RAM”. This creates confusion: how much RAM does the device actually have? Here it is important to distinguish between physical memory and virtual expansion technologies that manufacturers are actively implementing.
Physical memory is real chips soldered on the motherboard. Their volume cannot be changed. Virtual memory (called differently by different brands: Samsung, Xiaomi, Realme) is a technology borrowed from desktop operating systems. It allows you to use part of the built-in storage ( RAM Plus from Samsung, Memory Extension from Xiaomi, Dynamic RAM Realme) is a technology borrowed from desktop OSes. It allows you to use part of the built-in storage (ROM, where photos and applications are stored) as an addition to RAM.
| Memory type | Designation | Speed | Purpose |
|---|---|---|---|
| Physical RAM | LPDDR4X / LPDDR5 | High (thousand MB/s) | Running applications, system operation |
| Virtual RAM | Swap / ZRAM | Low (depending on UFS) | Storage of background processes |
| Built-in memory | UFS 2.1 / 3.1 / 4.0 | Medium | File storage, OS, cache |
The system automatically moves inactive applications from fast RAM to slower virtual memory, freeing up resource-intensive RAM for current tasks. This creates the illusion of a large amount of memory, but in terms of operating speed, virtual memory is significantly inferior to physical memory. This is why a smartphone with 8 GB of physical memory often works faster than a device with 4+4 GB (4 physical + 4 virtual).
Virtual memory does not replace physical RAM in speed. It only helps to keep more applications in the background, but does not speed up the operation of heavy games or apps.
Why is the available volume less than stated?
Having bought a phone with 6 GB of RAM, the user may find in the settings that only 4.5–5 GB are available. Where did the rest go? This is not a defect or a system error, but a normal phenomenon due to the architecture of mobile processors.
Part of the RAM is strictly reserved for the needs of the system and hardware components. First of all, the graphics processor “bites off” a significant piece (GPU). Mobile devices do not have their own video memory, so graphics use some of the shared RAM. Memory is also reserved for the modem, signal processor and operating system kernel, which must always have quick access to certain blocks of data.
In addition, manufacturers often indicate a “round” capacity of memory chips, although the actual capacity may be slightly different (for example, 5.8 GB instead of 6 GB), but for marketing purposes it is written 6 GB. The difference between “total” and “user accessible” usually ranges from 15% to 25% of the total.
If the difference between the declared and available volume is more than 30-40%, this may indicate a problem. Perhaps part of the memory is damaged and disabled by the controller, or a software failure has occurred in the system. In such cases, it is recommended to perform a factory reset or contact a service center.
Frequently asked questions (FAQ)
Is it possible to increase the physical amount of RAM on Android?
No, it is not possible to increase the physical amount. Memory chips are soldered onto the motherboard and cannot be replaced or added at home. Theoretically, resoldering chips is possible in specialized services, but this is not economically feasible and often leads to unstable operation of the device.
Why is there less free memory after updating Android?
New versions of the operating system often become more resource-demanding. These may include new background services, improved interface graphics, and more complex security algorithms that consume more RAM. This is a normal situation if the device is on the border of the system requirements of the new OS.
Does the amount of RAM affect the charging speed?
Directly - no. Charging speed depends on the power controller, battery and charger. However, if there are many heavy processes running in the memory, the processor works more actively, the device heats up, and the system can artificially reduce the charging current to protect against overheating, which indirectly slows down the process.
Do you need to use memory cleaning applications (Clean Master and analogues)?
In modern versions of Android this is not necessary. The system automatically manages memory, unloading unnecessary processes. Third-party “cleaners” often consume resources themselves and can even slow down work, since after a forced cleaning, the system restarts the necessary services, using up battery power.
Which is better: less memory with a high frequency or more with a low frequency?
For most tasks, the total volume is more important. 8 GB of LPDDR4X memory will provide more stable multitasking than 4 GB of faster LPDDR5. However, ideally you need to strive for a balance: sufficient volume (minimum 6-8 GB) and the current speed standard.