Samsung Rolls Out Stable One UI 9 to Galaxy S26 Series in US
Samsung has begun the stable One UI 9 rollout for Galaxy S26, S26 Plus and S26 Ultra on T-Mobile, Metro by T-Mobile and US Cellular.
Samsung has confirmed the stable One UI 9 rollout for more Galaxy S26 series models in the US, following the end of the beta program. Firmware pages list stable builds for the Galaxy S26, Galaxy S26 Plus and Galaxy S26 Ultra on T-Mobile, Metro by T-Mobile and US Cellular.
The US firmware build number for the series is S94xUSQU4BZID and carries a September 5, 2026 security patch. A screenshot shows a US unlocked Galaxy S26 Ultra receiving One UI 9 as firmware S948U1UEU4BZID, a download of 644.92MB. The update notice states the One UI 9 beta program has ended.
What's in the update
Samsung has published a stable One UI 9 changelog for the Galaxy S26 series. It includes Galaxy AI features such as enhanced Now nudge and My FanCam, plus a Warranty and care menu in Settings.
Other additions include a quick lock feature that uses the Volume down and Side buttons or the Power button in the quick panel, and a location access transparency indicator.
Quick answers
Which Galaxy S26 models are getting stable One UI 9 in the US?
Samsung firmware pages list stable One UI 9 builds for the Galaxy S26, Galaxy S26 Plus and Galaxy S26 Ultra on T-Mobile, Metro by T-Mobile and US Cellular.
What is the One UI 9 build number for the Galaxy S26 series?
The US firmware build number is S94xUSQU4BZID, with a September 5, 2026 security patch. The unlocked Galaxy S26 Ultra build shown is S948U1UEU4BZID.
What new features does One UI 9 bring to the Galaxy S26?
The changelog lists Galaxy AI features including enhanced Now nudge and My FanCam, a Warranty and care menu, a quick lock feature, and a location access transparency indicator.