Breaking: One UI 8 beta starts rolling out for the Galaxy S25 series

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 is 3.38 GB in size and has version numbers S938NKSU3ZYER / S938NOKR3ZYER / S938NKSU3BYER, depending on the region. This first beta update comes with May 1, 2025 security patch.

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 see from the beta announcement, Samsung is restricting the update download 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.