Samsung Galaxy A51 is one of the most popular mid-class smartphones from the Korean giant, released in December 2019. At the time of release, the device worked on Android 10 with a proprietary shell One UI 2.0, but over the years of support it received several major updates. However, many users still do not know which firmware version is current for their model, how to check it and whether it is possible to update to a newer OS.

In this article we will look at all the nuances: from determining the current version of Android to instructions for updating (including manual methods via Odin or Smart Switch). We will pay special attention to regional differences - firmware for SM-A515F (global version) and SM-A515U (USA) can be updated differently. You will also find out why some devices are stuck on Android 12despite Samsung's promises, and what to do about it.

Official Android versions for Samsung Galaxy A51

Smartphone Galaxy A51 received 3 major OS updates during support (2019–2023). Here is the full chronology:

  • 📱 Android 10 + One UI 2.0 - factory firmware (December 2019).
  • 🔄 Android 11 + One UI 3.1 - the first major update (2021).
  • 🚀 Android 12 + One UI 4.1 - second update (2022).
  • ❌ Android 13 — not all models received this update (details below).

Important: Samsung has officially ended support for the Galaxy A51 in 2023. This means that there are new versions of Android (for example, Android 14) for this model will not. However, some operators or regions may release security patches even after the end of mainstream support.

📊 What version of Android are you using?
Android 10
Android 11
Android 12
Android 13
I don't know

How to check the Android version on Galaxy A51

You can find out the current firmware in 30 seconds through the settings menu:

  1. Open the application Settings (gear on the main screen).
  2. Scroll down and select Phone information.
  3. Click on the item Software information.
  4. Look for the lines:
    • Android version —for example, 12.
    • One UI version —for example, 4.1.
    • Build number —for example, A515FXXU5FWH1.

If there is no item in the menu Software information, try alternative path: Settings → Device maintenance → Software information.

💡

Build number (for example, A515FXXU5FWH1) helps you find the exact firmware for your model on sites like SamMobile or Frija. The last 3 characters (FWH1) indicate the version of the security patch.

Why do some Galaxy A51s not have Android 13?

Despite the fact that Samsung promised update to Android 13 for everyone Galaxy A51, many users never received it. Reasons:

  • 🌍 Regional restrictions. Models for the USA (SM-A515U) and some Asian countries are often updated later or do not receive updates at all.
  • 📶 Dependency on the operator. If the phone was purchased from a mobile provider (for example, AT&T or Verizon), updates may be blocked.
  • 🔧 Technical limitations. Some modifications with 4/64 GB of memory are not supported Android 13 due to lack of space for the system.

The most reliable way to check the availability of Android 13 for your model is to use the service Samsung Members or manually search for firmware by build number.

⚠️ Attention: If your Galaxy A51 purchased from a telecom operator, remove the SIM card or contact your provider's support before updating. Some firmware may “break” the operation of the mobile network after the update.

How to update Android on Samsung Galaxy A51

There is 3 official methods update the firmware. Let's look at each with step-by-step guide.

1. Over-the-air (OTA) update

The simplest method, but requires a stable Internet connection:

  1. Connect to Wi-Fi (updating via mobile data may lead to additional costs).
  2. Go to Settings → Software update.
  3. Click Download and install.
  4. If an update is found, confirm the installation and wait for the reboot.

Battery charge > 50%|Connecting to Wi-Fi|Freed ≥ 3 GB of memory|Disabled VPN/proxy|Data backup made-->

2. Update via Smart Switch (PC)

If OTA does not work, use the proprietary utility Samsung Smart Switch:

  1. Download and install Smart Switch on your computer (Windows/macOS).
  2. Connect the phone to the PC via the original cable USB Type-C.
  3. Run Smart Switch and wait for the device to be recognized.
  4. If an update is available, the app will offer to install it.

Advantage of the method: Smart Switch sometimes finds firmware that is not available via OTA (for example, for those blocked by the operator models).

3. Manual flashing via Odin (for experienced ones)

If the official methods do not work, you can flash the device manually. This is risky —if an error occurs, the phone can turn into a “brick.”

Required:

  • 🖥️ Computer with installed Odin3.
  • 🔌 Original USB cable.
  • 📄 Firmware for your model (download only from trusted sources, for example, SamMobile).
Step-by-step guide for flashing firmware via Odin

1. Download the firmware (file with the extension .tar.md5) and unpack it.

2. Launch Odin in administrator mode.

3. Turn off the phone and switch it to Download Mode: hold down Volume Down + Power, then confirm by pressing Volume Up.

4. Connect the phone to the PC - the message "Added!" should appear in Odin.

5. In the AP section, select the firmware file and click "Start".

6. Wait for it to finish (do not disconnect the cable!). automatically.

⚠️ Attention: Firmware via Odin resets all data! Make a backup copy via Smart Switch or manually copy the files to your PC. Also make sure that the firmware is suitable for your model (SM-A515F, SM-A515U etc.).

Table of firmware versions for different regions

Android and One UI versions may vary depending on the country. Below is the current data for popular modifications Galaxy A51:

Model Region Latest version of Android Latest version of One UI Last update date
SM-A515F Europe (CSC: OXM) 12 4.1 March 2023
SM-A515F Russia (CSC: SER) 12 4.1 February 2023
SM-A515U USA (Unlocked) 13 5.1 June 2023
SM-A515U1 USA (Verizon) 12 4.1 April 2023
SM-A515W Canada 13 5.1 May 2023

CSC code (OXM, SER etc.) indicates your firmware region. CSC can be done through the engineering menu: enter the code in the phone application *#1234#.

What to do if the update does not install?

If Galaxy A51 does not update, try the following steps:

  • 🔄 Restart your phone and check again.
  • 🧹 Clear cache applications Software update:
    1. Go to Settings → Applications.
    2. Find Software update and select Storage.
    3. Click Clear cache.
  • 📡 Change update server:
    1. Install the application Samsung Members.
    2. Go to Settings → Software update → Settings.
    3. Enable the option Download updates via Wi-Fi only and turn it off back.
  • 🔧 Reset network settings: 
    Settings → General management → Reset → Reset network settings

    • If nothing Perhaps your model helps. In this case, the only remaining options are manual firmware (see section above) or the use of custom firmware (for example is no longer supported. In this case, the only option left is manual firmware (see section above) or the use of custom firmware (for example, LineageOS), but this requires unlocking the bootloader and will void the warranty.

    💡

    Before resetting the network or clearing the cache, save passwords from Wi-Fi and mobile data data (APN). They can be exported through applications like WiFi Password Viewer.

    Custom firmware for Galaxy A51: is it worth trying?

    After the end of official support, some users install unofficial firmware (for example, LineageOS, Pixel Experience or CrDroid). Pros and cons:

    Advantages Disadvantages
    ✅ Updates to Android 14 and later. ❌ Loss of warranty.
    ✅ No bloat (extra Samsung applications). ❌ Risk of "bricking" in case of an error.
    ✅ More customization functions. ❌ Possible bugs (for example, NFC not working).
    ✅ Better performance on old hardware. ❌ No official support (solve problems yourself).

    To install custom firmware you will need:

    1. Unlock the bootloader (via OEM Unlock in the developer settings).
    2. Install custom recovery (TWRP).
    3. Flash firmware and GApps (Google services).
    ⚠️ Attention: Unlocking the bootloader resets the data and can lead to problems with Samsung Pay, Secure Folder and other functions that depend on Knox. On some models (for example, SM-A515U for the USA), the bootloader is locked at the hardware level - it is impossible to unlock it.

    FAQ: Frequently asked questions about Galaxy A51 firmware

    My Galaxy A51 shows "Updates are not available." What should I do?

    Try:

    1. Wait 1-2 weeks - updates come out in waves.
    2. Use Smart Switch on PC.
    3. Check whether your operator has blocked the update (for example, T-Mobile or MTS).
    4. If all else fails, search for firmware manually on SamMobile (see section about Odin).
    Is it possible to roll back the firmware to an older version of Android?

    Technically yes, but:

    • 🔙 Rollback from Android 12 to Android 11 possible, but requires a complete reset.
    • ⚠️ On some models, the rollback blocks Knoxwhich leads to problems with Samsung Pay i Secure Folder.
    • 📉 After the rollback, OTA updates will not work - only manual firmware.

    Instructions: flash the desired version via Odin, but make a backup first!

    Why does the battery drain after the update?

    This is normal in the first 2-3 days - the system indexes the files and optimizes the work. If there is a problem. remains:

    • 🔋 Check Settings → Device care → Battery —there will be a list of the most power-hungry applications.
    • 🔄 Reset settings to factory settings (but not via Recovery, and through the settings menu).
    • 📉 Disable unnecessary functions: Always-on display, Auto brightness, background activity of applications.
    How do I know which firmware is suitable for my Galaxy A51?

    The firmware must match:

    1. Models (SM-A515F, SM-A515U etc.).
    2. Region (CSC). For example, for Russia it is SER, for Europe - OXM.
    3. Bootloader versions (bootloader). Installing firmware with a newer bootloader on old software will lead to a brick.

    Check the current CSC through the code *#1234# or in Settings → Phone information → Software information.

    Is it possible to install Android 14 on Galaxy A51?

    Officially - no. But there are unofficial methods:

    • 🛠️ Custom firmware (LineageOS 21, CrDroid based on Android 14).
    • ⚠️ Requires bootloader unlocking and installation TWRP.
    • 📉 Not all functions work (for example, the camera may produce artifacts).

    Look for instructions on the forums XDA Developers or 4PDA (only for experienced users!).