Galaxy Watch8 owners in South Korea are the first to receive the finished version of the company’s new watch software, One UI 9 Watch, which sits on top of Google’s Wear OS 7.
The build number is L320XXU2BZJ7. It is a roughly 2GB over-the-air download and includes the October 2026 security patch, so charge the watch and use Wi-Fi before starting it.
It ends a beta programme that opened in late August. Google showed off Wear OS 7 in May and delivered it to Pixel Watches in June, so Samsung’s own layer has been the slower part.
GSMArena listed the build number and size and expects wider availability within days, as with past Samsung updates. Samsung has not confirmed dates for other markets.
When it reaches your region, the update appears in the Galaxy Wearable app on the paired phone under Watch settings, then Watch software update. Keep the watch near the phone while it installs.
The patch level inside the build is dated 5 October 2026. Samsung’s watch updates have followed the pattern of its phone updates in recent months: a regional start, then a gradual widening to other countries.
Samsung has been releasing its recent updates country by country, with Korea nearly always first, so owners elsewhere should not worry if nothing shows up yet. Forcing a manual check does not make it arrive sooner, so waiting a few days is the sensible plan.
Samsung has not said which older models are next or when, so owners of earlier Galaxy Watches should expect a separate announcement. Details of the hardware itself are on Samsung’s Galaxy Watch8 page.
Older Samsung watches should follow the Watch8, according to the same outlet.
