Owners of budget smartphones often wonder what operating system is installed on their device and whether there are prospects for updating. Samsung Galaxy A21s, released in 2020, was originally supplied with Android 10 i shell One UI 2.1. This was the standard for the mid-segment at that time, providing a balance between functionality and hardware performance.
However, during the life of the device, Samsung released several major updates that significantly changed the appearance and capabilities of the gadget. The maximum official Android version for the Galaxy A21s is Android 12 with One UI 4.1 shell. After this, the manufacturer stopped supporting the model, blocking access to new security features and interface changes that appeared in Android 13 and 14.
If you just bought the device in person or took it out of the box, you need to check the current software version. This is critical to installing compatible apps and keeping your personal data safe. Next, we will analyze in detail the update history, manual installation methods and answer frequently asked questions.
Update history and current status
The path of software evolution Galaxy A21s was quite intense for a budget-class device. The smartphone began its life with Android 10, which featured a dark theme and improved gesture navigation. After some time, users received an update to Android 11, which brought widgets to the home screen and a redesigned quick access menu.
⚠️ Attention: Support for the model has officially ended. This means that new security patches are no longer released, and the device may become vulnerable to modern threats when actively using the Internet.
The final step was updating to Android 12 with interface One UI 4.1. This version brings smoother animations, improved clipboard handling, and new widget capabilities. At this point, official support has ceased, and further development of the software is possible only by enthusiasts.
It is important to understand the difference between the Android version and the security patch version. Even if you have the latest available firmware, the level of data protection may lag behind current standards. Check your settings regularly for fixes, as Samsung sometimes releases targeted updates for older devices.
How to check the software version and build number
To accurately determine the current system configuration, you do not need to use third-party utilities. All necessary information is available in the standard settings menu. This is the first step before any manipulations with the firmware or finding solutions to problems.
To access the data, follow these steps:
- 📱 Open the application
Settingson the main screen or in the notification shade. - 📜 Scroll to the bottom of the list and find the item
About phone. - 🔍 Click on the section
Software information.
Here you will see a line Android version i One UI version. Also pay attention to Security patch level. If the date in this line is older than a year, this confirms that there are no new updates for your device. The build number (for example, A217FXXU5DWH1) contains information about the firmware release date.
Make a note of the current build number before updating. If the new version is unstable, this information will help you find and roll back to the previous version through recovery mode.
Compatibility table for Android and One UI versions
Understanding the correspondence between the versions of the operating system and the Samsung proprietary shell helps you navigate the instructions and find the necessary firmware files. Below is a summary table for this model.
| Android version | One UI version | Year of update release | Key changes |
|---|---|---|---|
| Android 10 | One UI 2.0 / 2.1 | 2020 | Basic version, dark theme, digital balance |
| Android 11 | One UI 3.0 / 3.1 | 2021 | Widgets, new menu design, smart home |
| Android 12 | One UI 4.0 / 4.1 | 2022 | Latest version, new widgets, improved privacy |
As can be seen from the table, the device received two major major updates, which is a good indicator for its price segment. However, the lack of Android 13 and above limits the installation of some new applications that require fresh APIs.
Methods for updating to the latest version
There are two main ways to update software: automatic via the network and manual via a computer. The first option is preferable for most users, as it is safe and simple.
For automatic updating:
- 📡 Make sure that the smartphone is connected to a stable Wi-Fi.
- 🔋 Charge the battery to at least 50%.
- ⚙️ Go in
Settings→Software update→Download and installation.
If the server does not find updates, but you know that a new version exists, you can use the app Samsung Smart Switch on your PC. This method often helps when an OTA update (over the air) does not arrive due to regional restrictions or server failure.
☑️ Check before updating
Manual installation of firmware via Odin
Advanced users can use the utility Odin for manual flashing. This method allows you to update even if the automatic method does not work, or roll back to a previous version. However, this requires caution.
⚠️ Attention: Manual flashing via Odin resets all data from the device if the save mode is not selected. Be sure to take a complete backup of your important files before starting the procedure.
The process includes downloading the stock firmware for your region, installing the Samsung USB drivers, and running the Odin app on your computer. The smartphone is switched to Download Mode mode by holding down the combination of volume buttons.
Risks of manual updating
Incorrectly selected firmware (wrong region or model) can lead to software blocking of the device (brick). Only use files marked as CSC for your region.
It is important to select the correct firmware files that match your device's region code. Using firmware from a different region may result in some functions not working, for example, Samsung Pay or calls via Wi-Fi.
Custom firmware capabilities
After the end of official support, enthusiasts often create unofficial versions of Android based on LineageOS or Pixel Experience. This allows you to install Android 13 or even Android 14 on the Galaxy A21s.
Installing custom firmware requires unlocking the bootloader, which automatically voids the warranty (if it was still valid) and triggers security flags. Knnox. This means that banking applications and Samsung Pay will stop working without complex rooting manipulations.
On the other hand, custom firmware can significantly speed up the operation of an old device by removing unnecessary Samsung system processes. However, the stability of the camera and battery autonomy in such assemblies are often inferior to stock software.
Custom firmware is the only way to get the latest Android on the A21s, but this requires technical knowledge and a willingness to put up with possible errors in operation.
Frequently asked questions (FAQ)
Is it possible update Galaxy A21s to Android 13 officially?
No, official support for the model ended at Android 12. Samsung no longer releases updates for this device. You can get Android 13 only by installing unofficial custom firmware.
Why doesn’t the update arrive via Wi-Fi?
This may be due to the region of the SIM card, changed system software, or simply the sequence of rollout updates. Try using the Smart Switch app on your computer to force a scan.
Is it safe to use Android 12 in 2026-2026?
The system remains functional, but the lack of fresh security patches makes the device vulnerable when visiting dubious sites or installing applications from unknown sources. Be careful with online banking.
Will the update reset my data?
A regular update through settings (Settings → Software update) saves all your data, photos and applications. Reset occurs only when manually flashing via Odin or switching between major versions in some rare cases.