Version Reference
Samsung Galaxy Firmware Versions
Every Samsung firmware release is identified by a build number (sometimes called a PDA code). This alphanumeric string encodes the device model, region, Android version, and release sequence. Understanding firmware versions helps you determine whether your device is running the latest available software.
A typical Samsung build number looks like S928BXXU3CYGA1. Each segment of this string carries meaning: the device model code, the region/CSC code, the firmware type, and a date-based version sequence.
This independent reference explains how Samsung firmware versions work and how to interpret the build numbers you see in your device's software information screen.
Understanding build numbers
A Samsung firmware build number is structured in segments. The first four characters identify the device model (e.g. S928 for the Galaxy S26 Ultra). The next three characters identify the region and carrier (the CSC code). The following letters indicate the firmware type — U typically denotes a major update, while other letters indicate incremental or security-only updates. The final alphanumeric string is a date-based version code.
Version numbering conventions
Samsung does not use simple sequential version numbers like 1.0, 2.0 for firmware. Instead, the build number encodes the release information. A change in the firmware type letter (for example from S to U) usually indicates a more significant update. The final characters of the build number are based on a date code that helps identify when the firmware was compiled.
How to read your firmware version
To find your current firmware version, go to Settings > About phone > Software information on your Galaxy device. The build number shown there is your firmware version. You can compare this against the records in our firmware ledger to determine whether a newer version is available for your device and CSC region.
Frequently asked questions
What is a Samsung firmware build number?+
A build number is an alphanumeric string that uniquely identifies a firmware release. It encodes the device model, region/CSC code, firmware type, and a date-based version sequence. For example, S928BXXU3CYGA1 identifies firmware for a specific device and region.
How do Samsung firmware versions work?+
Samsung firmware versions are identified by build numbers rather than simple version numbers. Each build number segment encodes device, region, and release information. A change in certain letters within the build number indicates the type of update (major, security, or incremental).
What is a PDA code on Samsung?+
PDA code is another term for the firmware build number. It identifies the specific firmware version installed on a device. The PDA code includes the device model, region, and version information in a single alphanumeric string.
How do I find my Samsung firmware version?+
Go to Settings > About phone > Software information on your Galaxy device. The build number listed there is your firmware version. You can compare it against our firmware ledger to check for newer releases.
Do firmware versions differ by region?+
Yes. The region and carrier information is encoded in the CSC portion of the build number. The same device model in different regions will have different build numbers reflecting different firmware customisations.
Related resources
SamsungFirmware.com is an independent information resource and is not affiliated with Samsung Electronics Co., Ltd. Firmware availability may vary by device model, country, carrier and region. See our editorial policy.