Samsung One UI 9 moved to Beta 3 on June 16 for the Galaxy S26, Galaxy S26+, and Galaxy S26 Ultra. Beta 4 is expected around June 30, which keeps the beta cycle on a roughly two-week rhythm for owners enrolled through the Samsung Members app.
Galaxy S26 beta timing
The pace matters because Samsung has already shipped three betas in five weeks, starting with Beta 1 on May 13 and Beta 2 on May 26. That cadence gives testers a clearer window for when the software may settle, and it also narrows the gap between a beta build and the version people are likely to trust on a daily phone.
Galaxy S26, S26+, and S26 Ultra owners in six countries can enroll through the Samsung Members app. That means the beta is not a broad public release yet, so only the devices in that program will see the changes early.
Android 17 stable release
June 16 was also the day Google released Android 17's stable build to Pixel devices. Samsung is building One UI 9 on Android 17 rather than on a moving preview platform, and Android 17 carries API level 37.
That shift matters for reliability inside the Android Runtime. Android 17 uses a redesigned garbage collector that separates short-lived objects from long-lived ones, then runs frequent lightweight young-generation memory sweeps instead of expensive full-heap scans, which the source says should reduce CPU usage, power drain, and UI stutter.
Beta 3 build ZZF7
Beta 3 weighed 1,786 megabytes and carried firmware version ZZF7 with the June 5, 2026 security patch. Samsung said the build fixed nine issues, including seven bug fixes and two improvements.
The fixes reach into everyday use. Camera zoom accuracy at 30x was corrected, Privacy Display behavior was fixed when toggling Quick Panel settings through routines, part of the camera preview screen no longer crops under certain conditions, and a lock-screen widget data refresh failure was addressed.
The one odd detail is visual, not functional. The Finder icon in Beta 3 went back to its One UI 8.5 appearance even though earlier One UI 9 builds gave it a new visual design, so testers watching the interface now have one more sign that Samsung is still adjusting the build before Beta 4 lands around June 30.
