Do you wonder what the code is in Samsung’s firmware version? Do you know that every Samsung update has different codes? Have you tried to decode them so you could understand them? If not, then in this article, I will guide you on how to read Samsung firmware numbers. Samsung always releases the latest software updates to its smartphones, smartwatches, and fitness bands. Every company has its way of showing the new software updates.
As a tech reader, I can say Xiaomi, Huawei, Apple, and Realme have a simple number system. Samsung shows it in the lengthy code, so you may sometimes find it difficult to notice it. For example, the newest version for Galaxy S25 is S931BXXU4AYC1, which is lengthy compared to Apple’s 14.1 versions for the iPhone.
Every day, there is at least one Samsung device that receives a newer version. Some firmware carries major features and changes, and some firmware comes with minor changes. Again, there are security updates from Google which you get every month or quarterly. So now you know which update is important, and which one only enhances security?
The beta version is also there, and now most of the smartphones will receive them in the coming months. Now, come with me to decode all the letters in the firmware version to know their meaning. In this example, we will take Galaxy S25’s latest software update S931BXXU4AYC1.
1. The first G931B part
In the firmware version, the first G931B is the model number of the Galaxy S25. You will see the G988F in some regions like Europe, India, Korea, Brazil, etc.
2. The part XX in the code
This XX part indicates the international or European version. Some carriers in many countries have different codes, like in the US, South Korea, and China. For example, South Korea has a code name NKSU to differentiate from other countries.
3. U4 is the bootloader version
As per the security policy of Samsung, you can’t downgrade to the lower bootloader version. Here, you are on bootloader version U4, so you can’t flash the U3 version.
4. The letter A indicates the major Android OS
The letter A is important. It shows the major update since the Android OS version. The letter A means the first update, B is the second major update, and so on. If in the future, Samsung releases One UI 7.1 version, then it will use code ‘B’ in its firmware. The letter Z means the beta version. When you see Z instead of A, B, C,…. & so on, then that is the beta version.
5. Y is for the current year
The eleventh letter in the code is for the current year. The given code Y is for 2025. 2024 has X, 2023 has W, 2022 has V and now 2025 has a Y code number. That means in 2026 we will get Z letter in the firmware code.
6. The next C is for the release month
With the letter C or the 12th letter, you will know in which month the firmware has been released. A is for January, B is for February, and so on. Here the C means March.
7. The last 1 number shows how many times the firmware has been built
To make perfect software, developers need time and effort. The last letter ‘1‘ shows that effort. With the last letter, you will know how many times the firmware was built.
I think I have covered all the letters in the firmware code. With these numbers, you can now find out the firmware version for your Galaxy device.
