Samsung Begins One UI 9.5 Testing for Z8 Foldables as S24 Receives New AI Features

Key points

• Internal firmware builds for One UI 9.5 have been spotted for the Galaxy Z Fold 8, Z Fold 8 Ultra, and Z Flip 8 on Samsung servers.
• The Galaxy S26 series is expected to be the first to receive the stable One UI 9.5 update, likely in 2027, ahead of the Z8 foldables.
• One UI 9.0 Beta 2 is currently rolling out to the Galaxy S24 series, bringing four AI features: Call Brief, My FanCam, Now Custom Cards, and Now Nudge.
• Samsung’s update strategy distinguishes x.0 releases, which introduce new Android versions, from x.5 releases, which focus on substantial feature updates without changing the Android version.
• The One UI 9.0 beta program now includes over 20 devices, ranging from flagships to mid-range models like the Galaxy A55 and A36.

Background

Samsung launched One UI 9.0 in August 2026, built on Android 17, initially for the Galaxy Z Fold 8, Z Fold 8 Ultra, and Z Flip 7. The company has since expanded beta testing to the S26, S25, and S24 series. In August, Samsung also began testing One UI 9.5 for the S26 series, signaling a faster mid-cycle upgrade cadence. The current developments indicate that Samsung is now extending this mid-cycle testing to its latest foldables while simultaneously pushing feature-rich beta updates to older flagships.

How outlets are covering it

SamMobile reports that One UI 9.5 testing has officially begun for the Z8 foldables, noting that the S26 series will likely receive the update first. PhoneArena and GSMArena focus on the immediate impact of One UI 9.0 Beta 2 for the Galaxy S24 series, highlighting the arrival of four new AI features. PhoneArena emphasizes that these updates may reduce the incentive for S24 owners to upgrade to the S26 Ultra, while GSMArena details the specific firmware version (ZZI4) and features included in the beta. BGR provides a broader view of the One UI 9.0 beta rollout, listing over 20 eligible devices and noting the inclusion of mid-range models, suggesting Samsung is prioritizing widespread feature distribution across its ecosystem.

Why it matters

The simultaneous progression of One UI 9.0 stable releases and One UI 9.5 development indicates Samsung’s commitment to a rapid update cycle. By bringing flagship AI features like My FanCam and Now Nudge to older devices such as the S24, Samsung aims to extend the lifecycle of its current user base. This strategy may influence consumer upgrade decisions, as users may opt to wait for software enhancements rather than purchasing new hardware. The inclusion of mid-range devices in the beta program also suggests a broader strategy to unify the user experience across Samsung’s diverse product lineup.

What to watch

Samsung is expected to launch the One UI 9.5 beta program for the S26 series, Z8 foldables, and other eligible devices later in 2026 or early 2027. The stable version of One UI 9.0 is anticipated to roll out to the Galaxy S24 series within two to four weeks of the current beta release. One UI 9.5 is projected to debut officially on the Galaxy S27 series in 2027, bringing substantial feature updates without a new Android version.