Samsung appears to be preparing a One UI 9.5 beta for the Galaxy S26 series. A test build for the Galaxy S26 Ultra has turned up on Samsung’s servers, according to firmware tracker Kailash (@Kailash0729). Samsung hasn’t announced a One UI 9.5 beta as of November 4. Treat this as an early sighting, not a launch.
What the One UI 9.5 test build shows
SamMobile reported the build for the global Galaxy S26 Ultra, citing Kailash’s find. SammyFans separately reported a matching build for the Korean model. Both strings end in ZZK3.
- Global model (S948B): S948BXXU6ZZK3
- Korean model (S948N): S948NKSU6ZZK3
- Build type: the “Z” fourth from the end marks a beta or test build, per SammyFans
- Bootloader: moved from U5 to U6, per SamMobile
- Base: Android 17, according to SamMobile
SamMobile reads the build as a sign that Samsung could open beta registrations soon. That is the outlet’s inference from the firmware, not a Samsung plan.
When could the One UI 9.5 beta start?
This is where the two outlets part ways, and neither is quoting Samsung. SamMobile expects the beta program to go live later this month or early next month. SammyFans points to mid-December instead. It adds that the start could slip to late December or January.
Both estimates rest on how Samsung has timed past betas. For a Galaxy S26 owner in the US or elsewhere, that means no firm date to plan around yet. The real signal will be an official notice from Samsung.
Both outlets also expect the stable One UI 9.5 release to debut with the Galaxy S27 series early next year. Samsung hasn’t confirmed that either. For more on next year’s phones, see our report on the Galaxy S27 Pro’s chip plans.
One UI 9 is still rolling out
The flagship beta work runs alongside a One UI 9 rollout that hasn’t finished. The stable update is still reaching mid-range phones such as the Galaxy A26 and Galaxy A54. If you’re waiting on that update, our list of Galaxy phones and tablets expected to get One UI 9 covers which models qualify.
Source: Kailash (@Kailash0729), via SamMobile, SammyFans
This post was written with AI assistance from public sources and published under the editorial responsibility of AndroidPure’s editor. How we work.
