Samsung Expands One UI 9 Beta Testing Across Galaxy Device Ecosystem

Samsung is aggressively accelerating the development of its Android 17-based One UI 9.0 software, with internal testing now expanding to a broad range of Galaxy devices. While the public beta program remains primarily focused on the flagship Galaxy S26 series, internal testing has quietly extended to include various models across the S, Z, A, M, and F series, as well as the Galaxy Tab S lineup. This rapid expansion signals Samsung's commitment to a faster, more widespread rollout of its latest software interface following the official launch of the platform on July 22, 2026.

The software development cycle has reached a critical phase as Samsung prepares for a wider stable release. While the Galaxy Z Fold 8 debuted the full One UI 9 experience, the company is now working to bring these advancements to older flagships and mid-range devices. The beta program, which initially launched in mid-May, has seen multiple iterations, with the Galaxy S26 series receiving eight beta builds to date. This testing phase is essential for refining performance and addressing device-specific issues before the stable software reaches the broader user base.

Samsung’s internal testing strategy has become increasingly inclusive, moving beyond the traditional flagship-only approach. The current list of devices undergoing internal testing is extensive, covering nearly every major product line in the Galaxy ecosystem. This includes the Galaxy S25 and S24 series, the Galaxy Z Fold and Flip series, and a significant number of Galaxy A, M, and F series phones. Even the Galaxy Tab S series, including the Tab S11 and S10 models, is currently being put through its paces.

Despite this broad internal testing, the public-facing beta program remains more restricted. Samsung has recently trimmed access to the beta program for older Galaxy devices, limiting participation to just four countries: India, South Korea, the UK, and the US. This decision has drawn criticism from users in regions like Germany and Poland, who were previously included in the testing pool. The company appears to be prioritizing the latest-generation hardware for public beta feedback while keeping the testing of older models strictly internal.

As the One UI 9 development progresses, Samsung is simultaneously focusing on stability and security across its existing portfolio. The recently launched Galaxy S26 FE, for instance, received its first software update just days after its August 27 release. Firmware version S741NKSU1AZHD, which includes the August 2026 security patch, addresses 56 security vulnerabilities and provides general stability improvements. This proactive approach ensures that new devices are optimized shortly after reaching consumers.

Similarly, the wearable ecosystem is seeing significant attention. The Galaxy Watch 8 and Watch 8 Classic have received the One UI 9 Watch Beta 2 update, which introduces the September 2026 security patch and fixes for Always On Display (AOD) and watch face reliability. Furthermore, reports indicate that the Galaxy Watch 6 series is next in line for the One UI 9 Watch beta, with build number R960XXU2ZZI1 spotted on test servers. These updates are crucial for maintaining the performance and reliability of Samsung’s wearable devices as they transition to the new Wear OS 7-based software.

Evidence suggests that the Galaxy A35 is also nearing its own beta phase. A screenshot shared on Samsung’s community forums revealed a dedicated beta section for the device, and a specific build—A356NKSUAZZH5—has been identified on Samsung’s test servers in Korea. This development is a clear indicator that Samsung intends to bring the One UI 9 experience to its mid-range segment sooner than in previous years. By opening the beta program to devices like the Galaxy A35, Samsung is likely aiming to gather a wider range of performance data across different hardware configurations.

This shift toward broader beta availability for mid-range devices reflects a change in Samsung’s software strategy. By involving a more diverse set of devices in the testing process, the company can better identify and resolve potential issues before the stable rollout. This approach is expected to result in a more polished final product for the millions of users who rely on Samsung’s mid-range smartphones for their daily tasks.

As September 2026 continues, the industry is closely watching for the official stable release of One UI 9.0. With the Galaxy S26 series beta program nearing its conclusion, a stable update for these flagship devices is anticipated within the coming weeks. Industry observers have noted that Samsung often aligns its major software releases with significant market events, and the upcoming iPhone 18 Pro and iPhone Ultra reveal on September 9 could serve as a strategic window for Samsung to push its own stable update.

While the company has not provided a definitive global release date, the pace of current testing suggests that the rollout will be swift once the stable version is finalized. Users are encouraged to monitor the Samsung Members app for registration details and update notifications. As Samsung continues to refine its software, the focus remains on delivering a consistent and reliable experience across its vast array of mobile and wearable products.