One UI 9 Beta Galaxy S25 Rolls Out With 3.86GB Build

Samsung has started rolling out the One UI 9 beta for the Galaxy S25 series, with a 3.86GB build now appearing for the S25, S25+, S25 FE and S25 Ultra. The update also brings the August 2026 security patch, which puts these premium phones back into Samsung’s Android 17 test cycle ahead of the stable release window.

For Galaxy S25 owners, this is the first real sign that Samsung is widening One UI 9 testing beyond its newest devices. The beta is already available in select markets, and the early changelog points to a mix of interface tweaks and feature updates rather than a full redesign.

Samsung has started rolling out the One UI 9 Beta Galaxy S25 update with the first beta version. The update is around 3.86GB in size and includes the August 2026 security patch, along with several new features and improvements for Galaxy S25 users.

Samsung Members Beta Enrolment Opens for Galaxy S25 Owners

Samsung is using the Samsung Members app to handle beta enrolment, which is the same process it typically uses to control how many users get early software builds at once. In this case, eligible users in India, the UK and South Korea can sign up first and then pull the update from Settings once the beta is available to them.

That matters because beta programmes are usually rolled out in stages. They let Samsung monitor feedback, catch bugs and reduce risk before pushing the final release more widely. Based on the current rollout pattern, the US and parts of Europe are likely to follow if Samsung decides to expand the program.

The Galaxy S25 series is now part of that testing path, which means Samsung’s last-gen premium phones are back in active Android 17 development. The timing also suggests Samsung is moving steadily toward the stable One UI 9 window, even if the first beta is not packed with dramatic changes.

Galaxy S25 Ultra Beta Build Adds Now Nudge and Fold 8 Finder

The early changelog for the first beta is fairly light, but it still shows where Samsung is heading. The build points to a customisable Quick Settings panel, which should give users more flexibility in how they arrange shortcuts and controls. There is also a smarter Now Nudge feature update and a refreshed media player, both of which suggest Samsung is polishing core system experiences rather than changing everything at once.

More interestingly, the beta appears to carry Galaxy Z Fold 8 Finder and camera changes such as Horizon lock. That is notable because it suggests Samsung may be testing or seeding premium features across more devices in the Galaxy family before One UI 9 reaches its stable form. Samsung often adjusts features in the beta phase, so these additions are worth watching even if they are not fully final yet.

For Galaxy S25 Ultra users, the update is still mostly about early access and testing. The size of the package, at 3.86GB, also shows this is not a small patch. Along with the security update, it signals a broader software refresh that could shape how the final One UI 9 release feels when it lands.

The One UI 9 Beta Galaxy S25 Rolls Out With 3.86GB Build, bringing the first beta update to Samsung Galaxy S25 series users. The update weighs around 3.86GB and also includes the August 2026 security patch, along with new features, improvements, and system enhancements.

Right now, the main takeaway is simple: Samsung has opened the next stage of One UI 9 testing for the Galaxy S25 series, and the first beta already points to a mix of interface cleanup, feature tuning and cross-device software sharing. If the rollout expands as expected, more regions should get a chance to try it before the stable release arrives.