One UI 8.5 Beta Update Rolls Out to Galaxy S25 With Bixby Patch

The One UI 8.5 beta update has started rolling out to Galaxy S25 series users, bringing a small but notable software change to Samsung’s latest flagship lineup. The new build is now available in India as Beta 4 and in global markets as Beta 5, depending on the region.

The update arrives with firmware version ZZAN and a file size of around 553MB. Samsung has included only a single listed change in this release, focused on an updated version of Bixby.

Samsung pushes minor but critical One UI 8.5 beta update

The rollout covers the Galaxy S25, Galaxy S25 Plus, and Galaxy S25 Ultra devices currently enrolled in the One UI 8.5 beta program. Users in India are receiving the fourth beta build, while users in other regions are seeing this release labeled as the fifth beta globally.

The official changelog shows just one line of change. It confirms that Samsung has applied a Bixby version update in this build. No additional features, UI tweaks, or security changes are listed in the update notes.

The relatively small file size and limited changelog suggest this release is focused on stability rather than new features. Samsung typically introduces larger changes in earlier beta cycles. A smaller update like this usually targets bug fixes or internal system adjustments that need immediate deployment.

Users can install the update by opening Settings, selecting Software update, and tapping Download and install. The rollout is being pushed in phases, so availability may vary by device and region.

Beta cycle nearing completion ahead of stable One UI 8.5

The release timing aligns with Samsung’s broader software roadmap. One UI 8.5 is expected to debut in stable form alongside the Galaxy S26 series, which is scheduled to launch on February 25, 2026.

This suggests the beta cycle for the Galaxy S25 lineup is approaching its final phase. Late-stage beta updates usually focus on polishing performance, refining system services, and resolving last-minute issues before a wider public release.

While Samsung has not officially confirmed the exact release date for the stable version on current devices, the pace of beta updates indicates that a public rollout could follow shortly after the Galaxy S26 announcement.

The One UI 8.5 beta update marks another step toward the final software release, bringing the Galaxy S25 series closer to its stable Android 16 experience with improved system performance and updated core services.