Samsung has released the second beta of One UI 8.5 for the Galaxy S25 series, widening access to more regions. The update focuses on stability improvements while laying the groundwork for the public release expected in early 2026.

Samsung launched the One UI 8.5 beta program for the Galaxy S25 series at the beginning of the month. Initially, it was limited to users in South Korea, Germany, the United States, and the United Kingdom.

With the rollout of the second beta build, identified as ZYLH, Samsung has expanded eligibility. Galaxy S25 users in India and Poland can now join the beta program via the Samsung Members app.

In previously eligible regions, the update is arriving as the second beta build. The firmware has a download size of around 1,143MB.

Focus on Stability and Bug Fixes

Major Issues Addressed in Beta 2

The One UI 8.5 Beta 2 update mainly targets stability issues reported by early testers.

One of the most significant fixes addresses intermittent rebooting, which had been a major concern in the first beta release.

Full List of Fixed Bugs

According to release notes shared by Samsung leaker @tarunvats33, the update includes several improvements:

Fixed intermittent initialization issues with quick panel settings during boot
Improved quick panel menu icon spacing and positioning
Resolved gallery issues where grouped photos were moved to the first album page
Fixed stuttering when opening the “More View” menu during calls
Addressed random rebooting problems
Fixed volume up button issues under specific conditions
Improved sound issues during Bluetooth car kit calls
Reduced forced shutdowns of multiple third-party apps
Improved overall software stability, including camera-related updates

Additional Changes May Be Coming

Samsung is expected to have made further UI refinements and added new features in One UI 8.5 Beta 2. These changes are not listed in the official release notes.

More details about hidden features and visual tweaks are likely to surface as more users install and test the update in the coming weeks.

Built on Android 16 QPR2

A First for Samsung

One UI 8.5 is still based on Android 16 but is built on the Android 16 Quarterly Platform Release 2 (QPR2).

This marks the first time Samsung, or any other Android manufacturer, has based its custom skin on a major Android quarterly update.

Performance and Customization Improvements

Android 16 QPR2 introduces performance optimizations, efficiency improvements, and additional customization options.

Samsung is expected to further enhance these features through One UI 8.5.

Public Release Timeline

Although the beta program began in early December, One UI 8.5 is still a few months away from a stable release.

Samsung is expected to roll out the public version in late February or March, likely alongside the launch of the Galaxy S26 series.