Samsung Begins One UI 9 Testing for Galaxy Z Fold 8 and Flip 8
Samsung has started internal testing of its next-generation One UI 9 software for the upcoming Galaxy Z Fold 8 and Galaxy Z Flip 8, according to recent firmware discoveries. This early development activity suggests the company is progressing with its foldable lineup for the second half of 2025, even as it prepares to launch the Galaxy S26 series with One UI 8.5.
Early Firmware Builds Spotted
Internal test builds for One UI 9 have been identified for both upcoming foldable devices. The Galaxy Z Fold 8 appears with firmware version F976USQU0AZB1, while the Galaxy Z Flip 8 carries firmware version F776USQU0AZB1. These early builds typically represent initial development phases where Samsung engineers test core functionality and compatibility before moving to more advanced testing stages.
The timing of these test builds aligns with Samsung's typical development cycle for major software updates. While the company focuses on launching the Galaxy S26 series with One UI 8.5 in early 2025, parallel development for the foldable devices' software suggests a coordinated roadmap that ensures both product categories receive timely updates.
Development Timeline and Expectations
One UI 9 is expected to be based on Android 16, continuing Samsung's tradition of building its custom interface on the latest Android foundation. The early testing phase indicates that Samsung is working to optimize the software specifically for the unique form factors of foldable devices, addressing aspects like multi-window functionality, app continuity between screens, and hinge-aware features.
Historically, Samsung begins internal testing of new software versions several months before public release. This early start for the Z Fold 8 and Z Flip 8 suggests the company is prioritizing software stability and feature development for its premium foldable lineup. The testing phase typically progresses through multiple internal builds before reaching beta testing with external users.
Market Context and Competition
The early software development comes as competition in the foldable market intensifies. With multiple manufacturers now offering foldable devices, software optimization has become a key differentiator. Samsung's One UI has been praised for its foldable-specific features, and early work on One UI 9 suggests the company aims to maintain its software advantage.
The Galaxy Z Fold 8 and Z Flip 8 are expected to launch in the second half of 2025, following Samsung's established release pattern for its foldable devices. The early software testing indicates that hardware development is progressing alongside software optimization, though specific hardware details remain undisclosed at this stage.
Conclusion
Samsung's initiation of One UI 9 testing for the Galaxy Z Fold 8 and Z Flip 8 represents a significant milestone in the development cycle of its next-generation foldables. The early firmware builds signal that software optimization is well underway, with specific versions already in internal testing. As development progresses, more details about One UI 9's foldable-specific features and improvements are likely to emerge, building anticipation for what Samsung has planned for its 2025 foldable lineup.
The parallel development of hardware and software underscores Samsung's integrated approach to product development, particularly for its premium foldable devices where software experience plays a crucial role in user satisfaction. With testing already beginning, the company appears on track for its expected second-half 2025 launch window.