Owners of a popular smartphone Samsung Galaxy A51 often wonder about the possibility of extending the life of their device through software updates. This model, released at the end of 2019, became a real bestseller thanks to its balanced characteristics and high-quality screen. However, over time, software support becomes a critical factor for the safety and comfort of using the gadget.
Initially, the device went on sale with an operating system Android 10, on top of which a proprietary interface was installed One UI 2.0. This was the standard for the mid-range segment of the period. Users who bought the phone in the first months of release received a stable platform with modern gesture navigation functions and an improved dark theme.
Today, the situation with software for this model has changed dramatically. The manufacturer fulfilled its support obligations by bringing the device to a certain version, after which the cycle of official updates was completed. Understanding the current status of the software is necessary to assess data security and compatibility with new applications that annually increase the demands on the system.
Official history of firmware updates
The company Samsung is famous for its policy of supporting middle-class devices, and Galaxy A51 was no exception to the rule. During its life cycle, the smartphone received several major major operating system updates. Each such update brought not only new functions, but also critical security patches that closed the vulnerabilities of the system kernel.
The first major step was the update to Android 11 with shell One UI 3.1. This update significantly changed the visual style of the settings menu and added privacy-enhancing features such as one-time permissions for apps. Users noted the improved performance of the clipboard and the ability to pin applications to the recent tasks menu.
This was followed by a transition to Android 12 interface One UI 4.1. This update introduced a completely new design called Material You, which allowed the system's color themes to change depending on the wallpaper chosen. The quick settings panel has also been redesigned and the ergonomics of using the smartphone with one hand have been improved.
⚠️ Attention: The final official update for this model was the version based on Android 13 with shell One UI 5.1. Further major updates to Android 14 or 15 are not officially expected from the manufacturer, since the support limit has been exhausted.
The latest stage of firmware evolution has brought optimization of RAM and new widgets for the lock screen. Despite Official support for major versions of Android has ended at version 13the device continues to receive regular quarterly security updates. This ensures that the smartphone remains protected from known viruses and exploits for some time.
How to check the current version of the system
Before taking any steps to upgrade, you need to know exactly what software is currently installed on your device. This will help you avoid version conflicts and understand whether any update is still available to you through official channels.
To view system information, you must go to the settings menu. Navigation in the shell One UI is intuitive, but the path to the treasured section may take several clicks. Open the application Settings on the home screen or in the applications menu.
Scroll to the bottom of the list of options. There you will find the item Phone information. By clicking on it, you will be taken to a section with technical information about the device, including model, build number and software version.
In the same menu there is a key element for updating. Click on the line Software information. The version Android and version One UIare displayed here. If a new update is available, the system will offer a download button, but for the A51 this will most likely only be a security patch.
If the update button is grayed out, try clearing the Google Play Services application cache or temporarily changing the region in the settings, although this rarely works for final versions.
Installation instructions updates
The process of updating software on smartphones Samsung is standardized and safe for the user if you follow simple rules. There are two main ways to get a new firmware version: via the Internet directly on your smartphone and using a computer.
Over-the-air update (OTA) is the most convenient method. To start it, make sure that the battery level is at least 50% and the network connection Wi-Fi is stable. Go to the menu Settings → Phone information → Software information and press the button Download and installation.
The system will contact the manufacturer's servers and check for the presence of a new build. If an update is found, the file will begin downloading. Once the download is complete, your phone will offer to install the update now or schedule it for the night. It is recommended to select installation immediately if you do not plan to use the phone in the next 15 minutes.
☑️ Preparing for a software update
An alternative method involves using a PC and a app Samsung Smart Switch. This method is often more useful if the over-the-air update gives an error or freezes during the verification phase. Connect the smartphone to the computer with the original cable and launch the application on the PC.
In the app interface, find the button Update. The computer will download the full firmware image and install it on the device. This method is considered more reliable, as it eliminates the risks associated with an unstable wireless connection when downloading large amounts of data.
⚠️ Attention: Never disconnect the USB cable or turn off the smartphone during the flashing process via a computer. Interrupting data recording can damage the bootloader and turn the phone into a “brick.”
Custom firmware and/root capabilities
For advanced users who are not satisfied with stopping updates on Android 13, it is possible to install unofficial software. The developer community actively supports the model, creating custom firmware based on newer versions of Android. Installing such firmware requires unlocking the bootloader. In devices XDA Developers actively supports the model Galaxy A51, creating custom firmware based on newer versions of Android.
Installing such firmware requires unlocking the bootloader. In devices Samsung this procedure triggers the flag Knoxwhich irreversibly blocks the operation of some secure functions, such as Samsung Pay, Secure Folder and some banking applications. This is a critical point that needs to be taken into account before starting modification.
Popular custom firmware, such as LineageOS or Pixel Experience, allow you to get pure Android 14 or even 15. They are devoid of unnecessary pre-installed software from the manufacturer and often work faster than the stock system due to optimization.
Risks of installing custom firmware
In addition to losing the warranty and the operation of Knox, there is a risk of getting an unstable system. The camera may perform worse due to the lack of proprietary photo processing algorithms, and the NFC module may be completely disabled in some assemblies.
The installation process begins with unlocking the bootloader through the developer menu. To do this, you need to go to Settings → Phone information → Software information and quickly click 7 times on Build number. Then in the menu that appears Developer options activate the item Unlock OEM.
Then the phone is switched to mode Download Mode (by holding down the volume buttons while USB is connected), where the unlocking is confirmed. After this, a custom recovery (for example, TWRP) is installed, through which the firmware itself is flashed. This is a complex process that requires care.
Technical characteristics and compatibility
The hardware platform Samsung Galaxy A51 is based on the processor Exynos 9611. This chipset, made using a 10nm process technology, shows decent results in everyday tasks, but its capabilities are limited when working with modern heavy interfaces of new versions of Android.
The amount of RAM in various modifications is 4, 6 or 8 GB. For comfortable work on Android 13 The minimum recommended volume is 6 GB. Owners of versions with 4 GB of memory may experience more frequent unloading of applications from RAM when using the latest versions of the system.
| Android version | One UI shell | Year of update release | Support status |
|---|---|---|---|
| Android 10 | 2.0 / 2.5 | 2019 | Completed |
| Android 11 | 3.1 | 2020 | Completed |
| Android 12 | 4.1 | 2021 | Completed |
| Android 13 | 5.1 | 2022-2023 | Security patches only |
Internal memory type UFS 2.1 provides acceptable loading speed for applications, but is inferior to the more modern UFS 3.1 standards, which began to appear en masse in subsequent A-series models. This affects the speed of installation of major system updates.
The Exynos 9611 hardware is still capable of running current applications, but the performance reserve for future heavy versions of Android has already been exhausted.
Frequent problems after the update and their solutions
Like any complex software product, system updates can bring with them not only new functions, but also certain glitches. Users Galaxy A51 sometimes encounter problems after upgrading to a new version One UI.
One of the common complaints is the rapid drainage of the battery in the first days after the update. This is normal as the system indexes files and optimizes applications in the background. Usually the problem resolves itself within 3-5 days of active use.
Sometimes users notice the interface slows down or the case heats up. In such cases, it is recommended to reset the network settings or clear the system application cache. Do not immediately panic and roll back the firmware; give the device time to adapt.
If the problems are critical, for example, constant reboots or a non-working sensor, a full reset to factory settings (Wipe Data) may be required. Before this procedure, be sure to save all important data to the cloud or to your computer, as all information from the phone will be deleted.
⚠️ Attention: Before performing a Hard Reset, make sure that you remember the password for your Google account. Otherwise, FRP protection will work, and it will be extremely difficult to unlock the phone without a purchase receipt.
Results and prospects for use
To summarize, we can say that Samsung Galaxy A51 has gone through a glorious path of updates, having received three major system updates. This is an excellent result for a mid-segment smartphone released in 2019. The current version Android 13 remains quite relevant for most tasks in 2026-2026.
Most popular applications from Google Play continue to support this version of the system for several more years. Social networks, instant messengers, banking applications and navigators will work stably and without functional limitations.
For those who want to keep the phone as their main device, it is recommended to stay on the official firmware and regularly install security patches. This will provide the best balance between camera stability, autonomy and personal data security.
Is it worth buying the A51 now?
Buying this smartphone new in 2026 makes no sense due to the lack of future Android updates. However, as a budget option on the secondary market for simple tasks (calls, YouTube, navigator), it is still relevant thanks to its good screen.
What version of Android is the Samsung Galaxy A51 officially updated to?
Official support for major updates has ended with the version Android 13 with the One UI shell 5.1. The smartphone continues to receive only security updates.
Is it possible to install Android 14 on the Galaxy A51?
Officially, no. Installing Android 14 is only possible through custom firmware (LineageOS, etc.), which requires unlocking the bootloader and entails loss of warranty and operation of Samsung Knox services.
Why does the phone quickly discharge after the update?
In the first 3-5 days after the update, the system performs background optimization and indexing of data. This temporarily increases battery consumption. The situation will normalize on its own.
How to check if there is a new update for my A51?
Go to Settings → Phone information → Software information → Download and installation. The system itself will check for new versions on the server.
What is the Knox flag and why is it important?
Knox is Samsung's security system. When unlocking the bootloader to install custom firmware, a physical fuse (e-fuse) is triggered, which irreversibly disables protected functions such as Samsung Pay and the Secure folder.