One UI 8, Samsung’s more stable update, is now arriving for the Galaxy S25, S25+, and S25 Ultra in additional regions, signaling a wider global rollout that’s just beginning.
After first being treated to a limited debut in Korea, owners in select parts of Europe are reporting they’re seeing the update available for their devices, with the package arriving as a rather hefty over-the-air download and is known by its build number ending in BYI3.
Rollout expands beyond Korea as more regions get One UI 8
Confirmed user reports on Reddit and X suggest the feature is available in France, Georgia, Germany, Poland, Sweden, Turkey, and the UK. Interestingly, even though many recipients were not enrolled in the beta program initially, this would seem to suggest that Samsung has decided to turn it on (fairly widely) and let in more than just a few hundred devices. Per usual, the rollout is staged, so devices within the same country might experience different timings based on sales channel and configuration.
In the United States, those who own the Galaxy S25 series are still waiting. It’s worth noting that unlocked models usually get major One UI updates early, with carrier variants to trickle out slower after further network testing. That already smooths the average delay of a gap between one and two weeks before it’s out in the wild; however, these sorts of releases ultimately depend on carrier certification.
Build details and download size for the stable release
The full stable build for non-beta users is weighing in at about 4GB, which is pretty standard for a platform-level update that brings with it a fresh batch of core system bits and Samsung’s apps. For people who’d signed up for the One UI 8 beta, there’s also an incremental final build (about 500MB in India) going out so those test devices are on par with the public release. Users report the firmware ID is BYI3, which you can check in Settings after the update.
To do so manually, go to Settings > Software update > Download and install. Make sure you have at least 8–10GB of free storage available for the download and post-install optimization, a battery level over 50%, and a reliable Wi‑Fi connection. You may experience a short optimization stage for apps and services after the reboot.
Eligible models and regional discrepancies
The update applies to the entire Galaxy S25 lineup – that is, the base model, S25+, and S25 Ultra. As is the case with previous Samsung launches, regional hardware discrepancies like chipset and modem variations may affect rollout timing. The CSC of your phone by country and by operator also controls the display of the update, so two identical phones sold in different markets may not display it at the same time.
If you’d rather go with a wired route, Samsung’s Smart Switch on PC or Mac will be able to pull software updates sometimes before they become available over the air. Community trackers like SamMobile’s firmware database and carrier update dashboards can also be helpful for knowing when a given build is widely available in your particular local area.
Why this rollout matters for Galaxy S25 owners worldwide
Major One UI releases often hit millions of Samsung flagships in a matter of weeks, shaping the real-world Android experience for a significant number of users. Samsung is often ranked among the top or near the leaders in global smartphone shipments by industry analyst firms like IDC and Counterpoint Research, indicating just how significant these updates are. The Galaxy S line is also a beneficiary of Samsung’s newfangled long-term device policy, introduced with its current flagship models and aimed at guaranteeing an extended period of OS and security updates to keep devices in service for longer.
How to follow your turn and confirm the stable build
Look for a notification in Settings or the Samsung Members app, where regional alerts typically pop up as waves roll out. Community megathreads on Reddit and posts from local fans can provide early indication about particular carriers or countries. After you’ve updated, make sure to check the build suffix (BYI3) under Settings > About phone > Software information to ensure you’re on the stable release.
If you still haven’t received the update, waiting it out is generally a good strategy—graduated rollouts like these allow Samsung to slow down distribution and resolve any last-mile issues promptly. For the moment, European S25 users are enjoying a little more attention, and other regions should see similar rollouts once approval queues empty out.