The question of which Android is installed on Samsung Galaxy A20worries many owners of this popular budget smartphone. This model, released in 2019, has become a real bestseller due to its price-quality ratio, but time is taking its toll. The software is becoming outdated, and users are starting to look for ways to extend the life of their device or simply understand what it is capable of in the current realities.
Initially, the device came out with a version Android 9.0 Pie in the One UI shell. However, the company Samsung traditionally supports its devices with security updates and major system updates for a certain period. For the series Galaxy A at that time, support amounted to two years of major updates. This means that the official development path for this model is limited to specific versions, which we will consider in detail.
It is worth understanding that the version number is not just a number. Compatibility with modern applications, the speed of the interface and the level of protection of personal data depend on it. If you are planning to buy a used device or just want to get the most out of your gadget, you need to know exactly the current state of the firmware and the possibilities of changing it.
Official history of firmware updates
The path of software evolution for Galaxy A20 has been clearly defined by the manufacturer. After starting on the ninth version, users received an update to Android 10 with the One UI 2.0 shell. This was a significant event, as there were new gesture navigation functions and an improved dark theme.
The final official release was the version Android 11 with the One UI 3.1 shell. At this stage, support for major operating system updates was discontinued. This is standard practice for the budget segment, where the life cycle of the device is shorter than that of flagship lines.
⚠️ Attention: Official security updates for this model have also been discontinued. Using a smartphone in 2026-2026 without additional protection measures may pose a risk when working with banking applications.
Despite the end of support, the system remains quite functional for basic tasks. However, the lack of new security patches makes the device more vulnerable to modern threats. Users should be careful when installing applications from unknown sources.
How to check the current version of the system
Before taking any action to change the software, you need to accurately identify current state of the device. In smartphones Samsung this information is hidden deep in the settings, but access to it is very easy. You do not need third-party utilities or a connection to a computer.
To obtain data, follow the standard algorithm. Open the settings menu and scroll to the bottom of the list. Find the section Information about the phone or About the device. This is where all the technical information about your gadget is stored.
Inside this section you are interested in the item Software information. By clicking on it, you will see several lines with numbers. We are interested in the string Android version. The version may be indicated nearby One UI, which is also important for understanding the functionality of the interface.
☑️ Checking the software version
Please note the date of the last security update. It is usually located just below the system version. If the date is older than a year, this confirms that automatic updates from the manufacturer are no longer received.
Self-updating through settings
Sometimes users do not receive a notification about the release of a new (for their device) firmware version automatically. In this case, you can force a check for updates. This is a safe method that does not require special knowledge.
Go to Settings and find the item Software update. It is usually located at the top of the list or in the maintenance section of the device. The system will contact the servers Samsung and check that your software is up to date.
If an update is available, you will see a button Download and install. The download process may take time depending on the speed of your Internet connection. It is recommended to use Wi-Fi to avoid wasting mobile data, as update packages can weigh several gigabytes.
⚠️ Attention: Before starting installation, make sure that the battery charge is at least 50%. Interrupting the update process due to a low battery may result in the smartphone not working.
After downloading, the system will prompt you to install the update. The device will reboot and you will see a logo Android with a progress bar. Do not touch the phone at this moment. The whole process takes from 5 to 15 minutes.
Before updating, free up at least 3-4 GB of internal memory. The system needs space to unpack the temporary installation files, otherwise the process may fail.
Problems and errors during update
Even the official update method is not immune to failures. Owners Galaxy A20 sometimes encounter a situation where the phone says “The latest version is installed,” although it is known that more recent software exists. This may be due to regional features of firmware distribution.
A common problem is a download error. It may occur due to an unstable connection to the server or conflicts in the update system cache. In such cases, clearing the data of the application responsible for updates helps.
To clear it, go to Settings → Applications. Find Software Update (Software update) in the list. Go to the application storage and click Clear data and Clear cache. After that, try checking for updates again.
| Error type | Possible reason | Solution |
|---|---|---|
| Not enough space | Internal memory is full | Delete photos/videos or transfer to SD |
| Network error | Problems with Wi-Fi or DNS | Change network or reboot the router |
| Server is busy | High load on servers | Try again in a few hours |
| Incompatibility | Custom firmware installed | Return stock firmware via Odin |
If all else fails, your device may have already received all the updates available for it. Further upgrade is possible only using unofficial methods.
Update errors are often solved by simply clearing the system application cache or changing the Wi-Fi network, and do not require complex repairs.
Installing custom firmware and LineageOS
For those who are not satisfied stop at Android 11, there is an alternative way - installing custom firmware. Enthusiasts create unofficial assemblies that allow installation Android 12, 13 and even 14 on Galaxy A20.
The most popular project in this area is LineageOS. This firmware offers a clean interface close to stock Android, and strips the device of the heavy One UI layer, which can have a positive effect on the performance of older hardware.
However, this process requires unlocking the bootloader and installing a custom recovery (for example, TWRP). This is a complex procedure that will void your warranty (if it is still in effect) and carries risks. Wrong actions can turn a smartphone into a “brick.”
What is bootloader unlocking?
Unlocking the bootloader is the process of removing manufacturer restrictions on installing unsigned software. On Samsung, this is done through the developer menu and service mode, but the procedure completely erases all data from the device (Factory Reset).
Before you begin, you should visit specialized forums, such as w3bsit3-dns.com or XDA Developers, and find a thread dedicated specifically to your model (SM-A205F, SM-A205FN, etc.). Firmware for different regions and modifications are not interchangeable.
Optimizing work on an old version of Android
If you decide to stay on the official firmware Android 11, you can significantly improve the responsiveness of the system. Over time, Samsung Galaxy A20 may begin to slow down due to accumulated garbage and background processes.
First of all, enable developer mode. To do this, go to Phone information → Software information and quickly click 7 times on the item Build number. After this, a new section will appear in the main settings Developer options.
In this section, find the animation scales: Window animation, Transition animation i Animator duration. Change the value from 1x to 0.5x or disable them completely. This will visually speed up the interface.
- 🚀 Disable unnecessary services in accessibility settings.
- 🗑️ Clear the application cache regularly through the device maintenance menu.
- 📵 Remove or freeze pre-installed applications that you do not use.
- 🌙 Use a dark theme to save battery power on an AMOLED screen.
It is also recommended to limit the background activity of heavy applications. Go to the battery settings and select optimization mode for all apps. This will prevent them from running in the background when you don't need them.
⚠️ Attention: When installing custom firmware, bank applications may stop working due to SafetyNet protection being triggered. To solve this problem, additional manipulations with root access and Magisk modules are required.
Frequently asked questions (FAQ)
Is it possible to officially update the Samsung A20 to Android 12?
No, Samsung has officially stopped supporting major updates for this model on Android 11. Get Android 12 can only be installed by installing custom firmware.
Will WhatsApp work on Android 11 in 2026?
At the moment, WhatsApp requires a minimum of Android 5.0, so it will work stably on the A20. However, in the future, requirements may increase, but this is unlikely in the next couple of years.
Why does the phone not see the update over the air?
You may already be on the latest available version, or Samsung servers are temporarily unavailable in your region. Also, the check may not work if the phone was purchased in another country (gray import).
Is installing LineageOS dangerous for the average user?
Yes, it is risky. The process requires technical skills. An error may result in data loss or damage to your phone. Do this only if you are confident in your actions and have made a backup copy.
How to return to factory firmware after custom?
To do this, you will need the Odin app on your PC and the official stock firmware for your model. The process is called "flashing" and completely restores the device to its factory state.