Many owners of a popular smartphone Samsung Galaxy A51 are wondering about the current software platform of their device. This model, released at the end of 2019, has experienced several major operating system updates during its life cycle. Initially, the device went on sale with Android 10, but thanks to the support policy of the South Korean giant, it received the opportunity to upgrade to more recent versions.
Today, the current state of the firmware for this model is One UI, based on Android 13. However, the situation may vary depending on the region of sale, the carrier, and whether the device was manually updated by the user. Understanding the current version of the software is critical to installing compatible applications and ensuring data security.
In this article, we will take a detailed look at the evolution of the software Galaxy A51, ways to check the current build, and instructions for a safe update. You will find out whether it is worth waiting Android 14 officially and what risks are involved in installing custom firmware on an already middle-aged device.
Update history and current software status
The smartphone Samsung Galaxy A51 was originally supplied with a shell One UI 2.0 on top Android 10. This was a standard solution for the mid-segment of that period. Users received a stable system with a recognizable interface and a basic set of security features. However, Samsung is known for its long-term support for devices, and the A51 was no exception to the rule.
The device received successive major updates over the next two years. First, users saw Android 11 with the One UI 3.1 shell, which brought an improved widget screen and new privacy settings. Then came the transition to One UI 4.1, which significantly changed the visual style towards minimalism and added the Material You color palette. Android 12 and One UI 4.1, which significantly changed the visual style towards minimalism and added the Material You color palette.
⚠️ Attention: Official support for major Android updates for the A51 model ended with version Android 13 (One UI 5.1). Attempts to find official OTA updates to Android 14 will not be successful.
The final major update available through official channels was the bundle Android 13 i One UI 5.1. After this, Samsung switched the device to receive only quarterly security updates. This means that the system kernel will not change, but critical vulnerabilities will be closed by the company's engineers for some time.
How to accurately check the Android version on the device
To find out what software is installed on it your Galaxy A51 right now, no need to download third-party utilities. All necessary information is contained in the system menu. This is the most reliable way to get reliable information about the build number and security patch level.
To do this, you need to go to your phone settings. Find the item Phone information at the very bottom of the list or at the top, depending on the interface version. The device model, serial number and software version are displayed here.
Click on the line Software information. A screen with detailed information will open in front of you. We are interested in two fields: Android version and One UI version. The first digit indicates the version of the system kernel, and the second indicates the version of the Samsung proprietary shell.
- 🔍 Android version: shows the number of the main operating system (for example, 10, 11, 12 or 13).
- 🎨 One UI version: indicates the version of the proprietary interface (for example, 2.5, 3.1, 4.1 or 5.1).
- 🛡️ Security patch level: the date of the last update of the vulnerability databases (for example, February 1 2026).
If you want to see more technical information, including the build number (PDA), you can quickly click 7 times on the item Build number. This activates developer mode, where additional logs and debugging options are available, useful for advanced users.
Write down the build number (for example, A515FXXS8HWC1) before any intervention in the system. This will help you return to the original state in case of an unsuccessful experiment.
The process of updating the firmware through the settings menu
The safest and recommended method of updating Samsung A51 is using the built-in OTA (Over-The-Air) mechanism. This method minimizes the risk of system damage and does not require connection to a computer. However, for it to work, a number of conditions must be met.
Before starting the procedure, make sure that the battery charge is at least 50%. The download and installation process may take from 15 minutes to an hour depending on the Internet speed and the size of the update package. It is also recommended to connect to a stable Wi-Fi network to avoid mobile traffic costs.
The algorithm of actions is extremely simple. Go to Settings, scroll down and select Software update. Click the button Download and installation. The system will automatically contact Samsung servers and check for a new version for your region and model.
☑️ Preparing for update
If an update is found, it will prompt you to download it. Once downloaded, the installation will begin and your phone will reboot. Do not interrupt this process and do not press the power buttons until the desktop appears. Interrupting the recording of system files may lead to a software failure.
⚠️ Attention: If the update button is grayed out or the system reports that the software is already updated, but you are sure there is a new version, try clearing the cache of the Google Play Services application or wait a few days, as updates come in waves.
Updating via a computer using Smart Switch
In cases where the over-the-air update does not work or the file is damaged, you can use a proprietary utility Samsung Smart Switch for PC. This method is more reliable because it uses a cable connection and allows you to restore the system in case of soft failures.
To begin, download and install the Smart Switch app on a computer running Windows or macOS. Launch the application and connect your Galaxy A51 to your computer using the original USB cable. Allow access to data on your smartphone screen if prompted.
A button will appear in the app interface on your computer Updateif a new software version is available for your device. The app itself will download the required firmware image and install it on the phone. This method is also convenient in that it allows you to make a full backup of your data before starting the procedure.
| Option | OTA (Over the Air) | Smart Switch (PC) |
|---|---|---|
| Required equipment | Only smartphone and Wi-Fi | Computer, USB cable |
| Download speed | Depends on Wi-Fi speed | Depends on the Internet speed of the PC |
| Reliability | Medium (risk of connection loss) | High (cable connection) |
| Possibility of rollback | No | Partially (via recovery mode) |
Using a computer is especially important if the phone’s internal memory is almost full. In this case, Smart Switch downloads the firmware to the computer's hard drive, saving space in the smartphone, which often becomes an obstacle to OTA updates.
Using a cable and PC is the best choice if the phone's battery is worn out and does not hold a charge for the long time required for updating.
Third-party firmware and risks customization
After the end of official support, many enthusiasts pay attention to custom firmware, such as LineageOS or Pixel Experience. For Samsung A51 there is an active community of developers porting newer versions Android 14 and even Android 15 to this device.
Installing such firmware requires unlocking the bootloader, which automatically triggers the counter. Knox. This is an irreversible process that will permanently void the owner's warranty (if any was still in effect) and disable Samsung's secure features such as Samsung Pay, Secure Folder and some banking applications.
The process of installing custom software is complex and requires an unlocked bootloader, custom recovery installed (for example, TWRP) and a full understanding of the risks. An error at any stage can turn the phone into a “brick”, the restoration of which will require soldering and special equipment.
- 🚫 Loss of warranty: The Knox flag is triggered forever when the bootloader is unlocked.
- 💳 Problems with banks: Many banking applications refuse to work on rooted devices.
- 📸 Camera deterioration: Photo processing algorithms in stock Samsung firmware are often better than in custom ones.
For an ordinary user who needs a stable phone for calls and instant messengers, switching to custom firmware is rarely justified. The loss of stability and security often outweighs the advantage of getting a new version of Android on old hardware.
⚠️ Attention: Before any manipulations with the bootloader, be sure to make a full backup of your data (EFS, Personal), since if there are failures, IMEI and the ability to work with the cellular network may be lost.
Optimizing Android 13 on Samsung A51
Even on the latest official version Android 13 the smartphone may start to work slower over time. This is due to cache buildup, memory fragmentation, and storage wear. Proper optimization will help prolong the comfortable use of the device.
First of all, it is recommended to remove unused applications and clear the system services cache. You should not use “cleaners” from the app store, as they often consume resources themselves. The built-in maintenance in the menu Device care copes with this task much more efficiently.
It is also worth paying attention to the interface animations. In developer mode, you can change the animation scale of windows, transitions, and animator duration from 1x to 0.5x. This will visually speed up the interface, making the system response more instantaneous without any real load on the processor.
Secret speed setting
In developer mode, find the "Background processes" item. Limiting the number of processes to 2-3 may free up RAM, but may result in applications restarting in the background. Use with caution.
Regularly rebooting the device at least once a week helps to reset temporary errors in the operation of RAM and services. If the phone starts to heat up or quickly discharges after the update, try resetting the network settings or performing a full factory reset with a preliminary backup.
Frequently asked questions (FAQ)
Will the Samsung A51 receive an update to Android 14 officially?
No, official policy Samsung support for the A51 model ended on version Android 13. The device received two major OS updates (from 10 to 11, from 11 to 12, from 12 to 13), which complied with the warranty at the time of release. Further updates will only concern security patches, but not changes to the kernel version.
Is it safe to update if the phone is already old?
Yes, updating to the latest available official version (Android 13) is safe and even desirable, as it contains important vulnerability fixes. However, if the device has a very worn battery or memory problems, the update process may take longer, so make sure that the power source is reliable.
Why is the update not received over the air?
There may be several reasons: the device region is different from the SIM card region, the phone was previously flashed to an unofficial version, or Samsung servers have not yet sent the package for your specific serial number. In this case, use the Smart Switch app on your PC to force a check.
Is it possible to return to Android 10 or 11 after updating?
It is officially impossible to roll back to an older version of Android through the settings. This can only be done by flashing the device through the Odin app using special factory firmware (Stock Firmware), which requires technical skills and is associated with the risk of data loss.