Overview
- The update rollout began in South Korea on Wednesday with the Galaxy S26 series and expanded the next day to the Galaxy S25 series and the Galaxy Z Fold 7.
- The June package fixes 45 vulnerabilities in total, of which 33 come from Google and 12 from Samsung, and includes five fixes marked as critical.
- Several devices are receiving Galaxy AI features that were missing from the One UI 8.5 stable release, specifically Prioritize Notifications, Summarize Notifications, and File Summaries.
- Firmwares carrying the June patch are unusually large—roughly 565MB to about 900MB—because Samsung bundled functional Galaxy AI additions with the security fixes and is rolling updates region by region from Korea outward.
- Separately, early One UI 9 (Android 17) test builds for mid-range Galaxy A-series models such as the A57, A34 and A17 have appeared on public OTA servers, indicating concurrent development of next‑generation software ahead of broader beta and device launches.