Samsung Initiates Early Testing of One UI 9.5 for the Galaxy S26 Series

Faster Development Cycle Points to an Earlier Beta Release

Samsung has already begun testing One UI 9.5 for the Galaxy S26 series. While One UI 9.0, built on Android 17, officially launched earlier this month alongside Samsung's latest Galaxy Z foldables—and the Galaxy S26 Ultra has been participating in the One UI 9 beta program since May—the company is already looking ahead to future software iterations.

According to industry reports from Tarun Vats, an early One UI 9.5 firmware build featuring a version string ending in CHZ1 is currently in active development specifically for the Galaxy S26 lineup.

For context, the development of One UI 8.5 for the previous-generation Galaxy S25 series did not kick off until mid-September last year. This indicates that Samsung is moving at a noticeably accelerated pace this software cycle. Consequently, the official public beta for One UI 9.5 could potentially roll out much earlier than its predecessor, which made its debut in early December 2025.

At present, the primary focus remains firmly fixed on refining One UI 9. Samsung is anticipated to issue at least one additional beta update for the Galaxy S26 series while eventually expanding the beta testing framework to include the Galaxy S25 series and other qualified legacy handsets.

For users eager to experience One UI 9 immediately, the current hardware prerequisites require purchasing a Galaxy Z Fold 8, Galaxy Z Fold 8 Ultra, or Galaxy Z Flip 8. All three foldable models are now commercially available worldwide, shipping with exclusive features that have not yet made their way to the Galaxy S26 One UI 9 beta builds.

When did Samsung start testing One UI 9.5?

Samsung started early internal development and testing of One UI 9.5 for the Galaxy S26 series shortly after the release of One UI 9.0.

Which devices are included in the early One UI 9.5 testing?

The early testing phase is currently centered on the Galaxy S26 flagship lineup, including the base model, S26+, and S26 Ultra.

How does this timeline compare to previous software updates?

Samsung is moving significantly faster this year; work on One UI 9.5 began much earlier compared to how late One UI 8.5 development started for the Galaxy S25 series.

Where can users experience One UI 9 right now?

Users can experience the fully realized version of One UI 9 right now by purchasing Samsung's latest foldable devices, such as the Galaxy Z Fold 8 or Galaxy Z Flip 8.

🔎 Ultimately, Samsung's early transition into testing One UI 9.5 underscores a stronger commitment to streamlining its software update pipelines. By expediting the development process, Galaxy flagship owners can anticipate a more refined, feature-rich user experience and faster software deployment timelines moving forward.