One UI 9.5 beta build surfaces on Samsung servers for Galaxy S26 Ultra
The firmware, version S948BXXU6ZZK3, is for the Galaxy S26 Ultra only, and Samsung has not announced a beta program or launch date.
A One UI 9.5 beta build for the Galaxy S26 Ultra has appeared on Samsung's Korean and US update servers, Engadget reported. The build carries firmware version S948BXXU6ZZK3 and is listed for the Galaxy S26 Ultra only.
Samsung has not announced the One UI 9.5 beta or a launch date. A build appearing on update servers typically precedes the opening of a public beta program, though the company has made no statement on timing.
The beta is expected to be available in Germany, India, Poland, South Korea, the UK and the US. Participants sign up through the Samsung Members app and then download the software via Settings > Software update.
One UI 9.5 is expected to launch with the Galaxy S27 early in 2027.
Previous beta cycles
Samsung opened the One UI 8.5 beta for the Galaxy S25, S25+ and S25 Ultra on December 8, 2025, with owners in Poland and India waiting until a second build on December 22. One UI 8.5 then launched on the Galaxy S26 at the February 2026 Unpacked event.
In late March, Samsung released an One UI 8.5 beta for the Galaxy S24 series, Z Fold 6, Z Flip 6, S25 FE, S24 FE and Galaxy Tab S11. The One UI 9.0 beta rolled out on May 13, and the stable One UI 9.0 arrived with the Galaxy Z Fold 8 and Z Flip 8 on July 22, alongside Google's Android 17 release.
Quick answers
Which devices can install the One UI 9.5 beta?
The spotted build, S948BXXU6ZZK3, is for the Galaxy S26 Ultra only. Samsung has not announced the beta or which devices it will cover.
How do I join the One UI 9.5 beta?
Users sign up through the Samsung Members app and then download the beta via Settings > Software update.
When will One UI 9.5 launch officially?
Samsung has not announced a date. One UI 9.5 is expected to launch with the Galaxy S27 early in 2027.