Samsung's stable Android 17 update reached the Galaxy S25, Z Fold 7 and Z Flip 7 in Korea on Sept. 28.
On Sept. 28, Samsung began rolling out stable One UI 9 to the Galaxy S25 series, Z Fold 7 and Z Flip 7, starting in South Korea.
The Galaxy S25 FE, S25 Edge and Z TriFold also picked up the stable update in Korea the same day.
Beta testers get about 535MB. An S25 Ultra jumping from One UI 8.5 downloads 3,851.56MB, so use Wi-Fi.
Android 17 plus Now Nudge, Now Brief, My FanCam, Security Brief, new privacy alerts and a more customizable Quick Settings panel.
Samsung has not given a U.S. date, but Korea-first rollouts usually expand to major markets within days. Back up before you update.
One UI 9 Just Reached the Galaxy S25, Fold 7 and Flip 7. U.S. Owners Are Next in Line