
Joe Maring / Android Authority
TL;DR
- Samsung has begun rolling out the first One UI 8 beta, starting with the Galaxy S25 series.
- The first beta is available in its home region of South Korea.
One UI 8 is on its way to your Galaxy phone, as Samsung has begun the One UI 8 beta testing program for the Galaxy S25 series, starting with its home region of South Korea.
As spotted by Tarun Vats, Samsung has started rolling out the first Android 16-based One UI 8 beta build for the Galaxy S25 series. The build, which is 3.38 GB in size and has version numbers S938NKSU3ZYER / S938NOKR3ZYER / S938NKSU3BYER, depending on the region.
The first rollout market for the beta is South Korea, but a user is reporting that the update is available for unlocked units in the US too:

As we can spot from the beta announcement, Samsung is restricting the download of the update to Wi-Fi only. So if you previously relied on your cellular data connection to download system firmware updates, you’ll now need to arrange for Wi-Fi to download the system update package.
This is a developing story. Please check back in some time for more details.