Random access memory (RAM) is one of the most critical components of any modern smartphone running an operating system Android. The speed of switching between applications, the smoothness of interface animation, and the device’s ability to keep complex processes in the background depend on the volume and state of RAM. If you notice that your phone has started to slow down, applications crash when you try to return to them, or the device suddenly reboots, the first thing you should do is diagnose the state of the memory.
Checking RAM on Android is not always a complicated procedure that requires connecting to a computer. In most cases, it is enough for the user to use the built-in tools of the system or install proven utilities for in-depth analysis. Understanding how resource allocation works will help you distinguish a software failure from a physical malfunction of the memory chip, which will save time and money during repairs.
In this material we will analyze in detail all available diagnostic methods: from simple built-in menus to professional tests via ADB. You will learn how to interpret the received data and what steps to take if a shortage of free resources or critical errors in the operation of the module is detected.
Using built-in developer tools
The easiest and safest way to get information about the current memory load is to activate developer mode in the settings of your smartphone. This hidden section provides access to detailed statistics for each running process. To activate, you need to go to the section Settings → About phone and find the item Build number.
Click on this item 7 times in a row. After several clicks, the system will ask you to enter your PIN code or pattern. As soon as you see the message “You have become a developer”, a new section will appear in the main settings menu For developers. This is where key performance metrics are hidden.
Inside the developer menu, we are interested in the item Running services (or “Running Services”). This displays a list of all active applications and system processes, as well as the amount of RAM they are consuming in real time. Pay attention to the “Memory Used” value - it shows the real load on RAM.
⚠️ Attention: Do not disable system processes manually through this menu if you are not sure of their purpose. Forced stop of the service android.system or Media Storage can lead to unstable operation of the interface or loss of multimedia data.
Also in this section, the “Limit background processes” option is often available. It allows you to artificially limit the number of applications that can remain active in the background. This is a useful feature for older devices with low memory (for example, 2 or 3 GB), allowing you to free up resources for the current task.
If the Used value is constantly close to the total capacity, try rebooting the device. This will clear the cache and terminate hung processes.
Third-party applications for monitoring and testing
When built-in tools are not enough to conduct a stress test or detailed analysis, specialized applications from the store come to the rescue. Google Play. These utilities can not only show the current filling, but also check for errors and bottlenecks in the memory subsystem.
One of the most authoritative tools is the application CPU-Z. It provides comprehensive information about the hardware of your smartphone. The tab Device will show the total amount of installed memory, and the tab System will display the current available and free memory. Moreover, the application will show the frequency of the processor, which indirectly affects the speed of data processing in RAM.
For deeper diagnostics, including stability tests, you can use AIDA64 or DevCheck. These apps allow you to run a load test by artificially populating memory with data to see if it crashes during peak loads. If during such a test the application crashes or the phone reboots, this is a sure sign of problems with the module. DRAM.
- 📊 CPU-Z: The best choice for quickly checking characteristics and current loading without unnecessary advertising.
- 🛠️ AIDA64: A professional tool for conducting stress tests and identifying overheating of components.
- 🧹 SD Maid: A cleaning combine that can also show detailed statistics on occupied system resources.
It is important to understand the difference between “free” and “available” memory. In modern versions Android the system tries to keep as many applications as possible in the RAM cache for quick launch. Therefore, the indicator “Free: 200 MB” with a total volume of 8 GB does not always mean a problem if the system is running smoothly.
Diagnostics through the engineering menu and codes
Many smartphone manufacturers, such as Xiaomi, Samsung or OnePlus, build special engineering menus into the firmware. They can be accessed through the standard Phone application by entering certain USSD codes. These menus allow you to run hardware tests that check the performance of chips at the physical level.
The most universal code for entering the extended testing menu is ##4636##. After entering this combination of characters, the menu Testingwill automatically open. Here you need to select the “Usage statistics” or “Battery information” item, where memory data is sometimes duplicated. However, the functionality of this menu highly depends on the specific model and firmware version.
For processor-based devices MediaTek the code ##3646633##often works, opening a full-fledged engineering menu MTK Engineer Mode. In the Hardware Testing → Memory section you can run read and write tests. This is a critical diagnostic step if you suspect physical degradation of memory chips.
| Manufacturer | Login code | Diagnostics section | What it checks |
|---|---|---|---|
| Universal (Android) | ##4636## |
Usage / Statistics | General process statistics |
| MediaTek (MTK) | ##3646633## |
Hardware Testing > Memory | Read/Write, cell integrity |
| Samsung | #0# |
RAM | Basic accessibility test |
| Xiaomi / Redmi | ##6484## |
Version / Tests | Comprehensive check all modules |
⚠️ Attention: Be extremely careful in the engineering menus. Changing parameters in sections
ConnectivityorRF Testingwithout proper knowledge can lead to loss of network signal or the need to flash the device.
If the code does not work, the manufacturer may have blocked access to this functionality in your firmware version. In this case, you should contact the official support forums for your model or use diagnostic methods via a computer.
Why don’t codes work on new Androids?
Starting with Android 9 and especially in Android 10-14, Google has tightened its security policies. Many old USSD codes have been disabled at the system level to prevent unauthorized access to the radio module and memory settings by malware.
Checking RAM through a computer and ADB
The most accurate data on the memory status can be obtained by connecting the smartphone to the computer and using the tools Android Debug Bridge (ADB). This method requires preliminary preparation: installing device drivers and setting up USB debugging in the developer menu.
After connecting, open the command line on your PC and enter the command to obtain detailed information about the memory. The system will issue a report indicating the overall indicators and distribution by zones. This allows you to see if some hidden process is “eating” resources.
adb shell dumpsys meminfoThe result of executing the command dumpsys meminfo will show a summary table. The line Total RAM indicates the physical volume, and Free RAM the actual free volume. Particular attention should be paid to section Native Heap i Dalvik Heap. If the values here are abnormally high even with applications closed, this may indicate a memory leak in the system.
☑️ Preparing for diagnostics via ADB
To check the integrity of memory at a low level (which is important if a defect is suspected), you can use the command that displays information from the system core. It will show the status of memory pages and the presence of error correction (ECC), if the memory controller supports and logs them.
adb shell cat /proc/meminfoAnalyzing the output of this command requires certain technical knowledge. Look for lines MemFree, Buffers, Cached. Sharp jumps in values or constant decrease MemAvailable to critical minimums (less than 100 MB) indicate that the system does not have enough resources for normal operation.
The ADB method is the “gold standard” for diagnostics, as it provides data directly from the system kernel, bypassing the manufacturer’s interface add-ons.
Analysis of the causes of memory leaks and freezes
Often the problem is not a physical breakdown of the chip, but a software error that causes a so-called “memory leak”. This is a situation where an application requests resources, uses them, but forgets to release them after shutting down. Over time, free RAM runs out, and the system begins to aggressively terminate processes, which is perceived by the user as slowdowns.
The main culprits are often “heavy” social networks (for example, Facebook or Instagram), instant messengers with a large number of media files and unoptimized games. Also affected by the number of widgets on the desktop and live wallpapers, which constantly consume processor cycles and memory cells.
- 🐛 Errors in application code: The developer did not specify the correct release of resources after closing the window.
- 🔄 Background synchronization: Dozens of applications simultaneously try to update data in cloud.
- 🗑️ Clogged cache: Although the cache is stored on the drive, its management mechanisms are closely related to RAM.
To identify the specific culprit, return to the menu Settings → Applications and sort the list by the amount of memory used (if there is such an option) or by the time spent working in the background. An application that has been running for 10 minutes but has consumed 500 MB of RAM must be deleted or forced to stop.
⚠️ Attention: Do not use “RAM Boosters” that promise to clear RAM with one click. In modern versions of Android, they do more harm than good, forcibly closing cached applications that the system needs, which forces the processor to waste extra energy on launching them again.
Optimization and solving memory problems
If diagnostics showed that the amount of RAM is critically small for your tasks, or software glitches are detected, it is necessary to carry out optimization. The first step should always be a simple but effective reboot of the device. This resets all temporary data and frees up fragmented areas of memory.
Next, it’s worth reviewing the list of installed applications. Remove the ones you don't use. For heavy applications that are rarely needed (for example, banking clients or delivery services), consider using their web versions through a browser or installing “Lite” versions, which consume significantly fewer resources.
In the settings for developers, you can enable the option Don't save activities (Don't keep activities). When this feature is enabled, the system will destroy each application as soon as the user minimizes it. This will free up maximum RAM, but will make multitasking impossible—when you return to the app, it will be downloaded again.
Use the Digital Wellbeing feature in Android Settings to set usage time limits for power-hungry apps. This will help control their background activity.
In extreme cases, if the problem persists after all manipulations and even after resetting to factory settings, physical degradation of the memory chip can be suspected. In such a situation, software methods are powerless, and the only solution is to replace the motherboard or purchase a new device.
Why does the memory quickly fill up again after a reboot?
This is normal behavior for Android. The system deliberately loads frequently used applications into RAM at startup so that they open instantly. Free memory at rest is not an optimization goal; the goal is the response speed of the interface.
Is it possible to increase RAM on Android programmatically?
You cannot physically increase the chip. However, on some devices with MediaTek or Qualcomm processors, there is a “Memory Expansion” (Virtual RAM) feature that uses part of the internal storage (ROM) as an addition to the RAM. This can be enabled in the settings if the manufacturer has provided such an option.
Does the fullness of the internal memory affect the operation of the RAM?
Yes, it does indirectly. When the internal memory (Storage) is more than 90% full, the system does not have enough space for the page file and data caching, which creates a load on the controllers and can lead to visible lags, which the user mistakes for a lack of RAM.
How to check if the memory on a new phone is defective?
Use applications like TestM or Phone Checkwhich conduct a comprehensive hardware test immediately after purchase. Also pay attention to spontaneous reboots in the first days of use - this is a common symptom of defective memory modules.
What is ZRAM and should it be disabled?
ZRAM is a technology for data compression in RAM. It allows you to store more data in the same physical volume at the expense of processor time for compression/decompression. It is not recommended to disable it, especially on devices with up to 6 GB of RAM, as this will worsen multitasking.