Not just S26, Samsung is already testing One UI 9.5 on the Galaxy S25

Throughout October, Samsung seemed to have one major mission: update most phones to One UI 9. With that ticked off, Samsung now appears to be preparing to get volunteers to try out the next version of its software for Galaxy devices, which is One UI 9.5. While a beta program for One UI 9.5 has yet to start officially, we’ve already seen glimpses of some of the upgraded features, such as the redesigned Samsung Calendar app, additional Bixby features, and even improvements to the Phone app.

While the Galaxy S26 series is the most deserving candidate for One UI 9.5 beta — and may already be in line to get it first, a rumor claims it could include more devices. According to SamMobile staffer Fahad Ali Jawed, Samsung appears to be testing One UI 9.5 beta on the Galaxy S25. This is based on new One UI 9.5 test builds spotted on Samsung’s internal servers, and there are not one but three of them, one after another.

Jawed notes that the latest of these builds carry firmware versions S938BXXUDEZKG, S938BOXMDEZKG, and S348BXXUDEZKG for the Galaxy S25 series. Furthermore, while previous rumors pointed to Samsung upgrading the Galaxy S26 to a newer bootloader (version 6), there’s no indication of this in the current build numbers. This assumption is based on the community’s understanding of Samsung’s build numbers, but nothing of the sort has been documented officially.

Since Samsung typically releases beta builds only for the top-of-the-line model, we anticipate it will start with the Galaxy S26 series and then release it for the Galaxy S25. It’s difficult to say when that could happen, but in another X post, Jawed predicts the beta for the Galaxy S26 could arrive as early as next week. There’s no way to verify this claim.

The first stable release of One UI 9.5 is anticipated alongside the Galaxy S27’s launch early in 2027, though a stable update for older phones may not arrive immediately after. We’ll share more details as we learn more about the development.