The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
A target rather than a fixed date, per gsmarena.com: "Samsung[5] Thailand was more forthcoming ... the Galaxy S25 series and the Galaxy Z7 foldables will get One UI 9 on September 28" - a single regional newsroom post that SamMobile[3] calls possibly tentative.
Samsung[5] Thailand's revised schedule keeps the S25/Z7 on 28 September and moves the Galaxy S26's update to the same day.
Independent read of the same Samsung[5] Thailand post, adding the 21 September global date for the S26 and cautioning it may be Thailand-only.
Cites Samsung[5] Thailand: the S25, Fold 7 and Flip 7 'will start receiving the Android 17-based update on September 28'.
Samsung's own newsroom announcement, which dates the rollout and names the first devices.
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.