Samsung has reportedly begun internal testing of One UI 9.5 for the Galaxy S26 Ultra, raising the possibility that its public beta program could open in the second half of November rather than in December. The build, identified as S948BXXU6ZZK3, was spotted on November 4.
That timing is earlier than the previous One UI 8.5 cycle, whose first beta build was identified on November 25, 2025, ahead of a public beta launch on December 8. Reports now point to a potential One UI 9.5 beta window of November 16 to 24, with November 23 mentioned as one possible start date.
A firmware build appearing on Samsung’s servers confirms neither public-beta readiness nor an enrollment date, however. Samsung has not announced the program, and internal testing can continue before software is released through the Samsung Members app.
The initial beta is expected to target the Galaxy S26 family and may be offered first in the following markets:
- South Korea
- United States
- India
- United Kingdom
- Germany
- Poland
One UI 9.5 is expected to be based on Android 17. A stable release is currently anticipated in early 2027 alongside the Galaxy S27 series, leaving Samsung’s confirmation of the public-beta timetable as the next key milestone.
