Samsung Readies One UI 9.5 Beta for Galaxy S26 Ultra as Build Hits 2 Servers

3 articles · Updated · Engadget · Nov 8

A One UI 9.5 beta build for the Galaxy S26 Ultra has appeared on Samsung’s Korean and U.S. update servers, a step that usually comes just before beta registrations open.
Firmware version S948BXXU6ZZK3 is the build spotted so far, and Samsung still has not announced a launch date even as the server listing points to an imminent release.
Users in 6 countries — Germany, India, Poland, South Korea, the UK and the U.S. — are expected to enroll through Samsung Members, then install the beta from Settings once access goes live.
U.S. carrier-locked phones may be excluded again, after last year’s One UI 8.5 beta was limited to unlocked devices and some markets got access only with a second build.
One UI 9.5 remains based on Android 17 and is expected to precede the Galaxy S27 launch in early 2027, filling the same mid-cycle role that One UI 8.5 did last year.