Samsung starts One UI 8.5 rollout for Galaxy S25 Ultra

Samsung is rolling out One UI 8.5 to the Galaxy S25 lineup, including the S25 Ultra, with the company saying the update began reaching devices in Korea on May 6 and will move to additional regions after that.

Credit: Samsung

Samsung’s rollout note lists the Galaxy S25 series alongside the S25 FE, Galaxy S24 family, Galaxy Z Fold7 and Z Flip7, Galaxy Z Fold6 and Z Flip6, plus the Galaxy Tab S11 and Tab S10 lines.

The update centers on a broader push around Galaxy AI, personalisation and privacy. Samsung’s One UI page says, “The new One UI 8.5 is capable of doing much more,” then points to AI tools such as Photo Assist and Now Nudge, plus a redesigned Quick Panel, refreshed navigation bars, Privacy Display and Privacy Alerts.

Samsung says the software is built to “suggest what I need at the exact moment” and to adapt to usage patterns across Galaxy devices.

For the Galaxy S25 Ultra, the stable rollout follows a long beta cycle.

Samsung opened the One UI 8.5 beta for the Galaxy S25 series on Dec. 8, 2025, and said it would be available in select markets including Germany, India, Korea, Poland, the U.K. and the U.S.

The company later expanded the beta to more Galaxy devices, which set up the current release across the S25 family.

Samsung’s own messaging is slightly split across pages.

Its U.S. One UI site says One UI 8.5 “will be first introduced with Galaxy S26, Galaxy S26+ and Galaxy S26 Ultra,” then says the update will expand to more devices as rollout continues.

The newsroom release, by contrast, says the Galaxy S25 series is already part of the May 6 rollout window.

The most direct reading is that Samsung is using the S26 family in one product page as a first-launch marker, then moving the same software to earlier flagships through a staged release.

Samsung also says availability and timing can vary by market and model, which leaves some room for carriers and regions to lag behind the initial Korean rollout.

For S25 Ultra owners, the update brings the latest Galaxy AI features without a hardware change, and it keeps Samsung’s newest software push anchored on the company’s current flagship line while the wider ecosystem catches up.