Samsung is expanding the stable One UI 9 update to the Galaxy S25 series in the United States, following the software’s initial release in South Korea. The update is based on Android 17 and is now rolling out to the Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra.

The Galaxy S25 FE is also listed with a separate firmware version, indicating that the newer model is included in the US rollout. Availability can vary by device and carrier, so some owners may need to wait before the update appears on their phones.

One UI 9 firmware versions for Galaxy S25 phones

For the standard Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra, the US update carries a firmware version ending in DZIF. The Galaxy S25 FE update has a firmware version ending in CZIF.

The installation requires a download of approximately 4GB. Users who participated in the One UI 9 beta program should receive a smaller package, since some of the update’s files may already be installed on their devices.

How to check for the One UI 9 update

Galaxy S25 owners in the US can look for the update directly from the phone’s software settings:

  1. Open the Settings app.
  2. Select Software update.
  3. Tap Download and install.

If no update is available, the rollout may not have reached the specific device or carrier variant yet. Checking again later should reveal whether the firmware has become available.

What the rollout means for Galaxy S25 owners

One UI 9 brings Samsung’s latest software release to the company’s current flagship phone family in the US. The Android 17 foundation makes this a major platform update rather than a routine security patch, although the available source does not detail the new features or changes included in the release.

Samsung began the stable rollout in South Korea before extending it to the US. That staged approach means other markets may receive the update separately, with timing potentially differing across regions, carriers, and individual models.

Owners should ensure their phone has enough free storage and is connected to a reliable Wi-Fi network before beginning the roughly 4GB download. As with other major Android updates, keeping the device connected to power during installation can also help avoid interruptions.