May 2025 security update lands on Galaxy Z Flip 5, Fold 5 after One UI 7
Samsung has released the May 2025 security update for the Galaxy Z Flip 5 and Galaxy Z Fold 5, following the rollout of the One UI 7 upgrade. This marks the first post-One UI 7 firmware update for both foldable devices.
- The update is currently rolling out in South Korea, with broader availability expected in the coming days.
- This phased rollout approach may lead to minor delays depending on region and carrier compatibility.
Build versions and update size
Users can identify the May update through the build versions F731NKSS5EYE2 for the Galaxy Z Flip 5 and F946NKSS5EYE2 for the Galaxy Z Fold 5.
- The installation package weighs in at approximately 400 MB, suggesting a focused release targeting security improvements.
- Before proceeding, users must confirm their devices are already updated to One UI 7.
Security enhancements included in the patch
The May 2025 patch addresses 58 high-level vulnerabilities as listed in Google’s Android security bulletin, with no critical or moderate issues reported this cycle.
- Samsung has also included 20 additional security fixes specific to One UI, with 13 of them detailed in the official changelog.
- These updates help ensure stronger system protection and safeguard sensitive features integrated into Samsung’s custom UI.
How to download and install the update
Owners of the Galaxy Z Flip 5 or Fold 5 can manually check for the update by heading to Settings > Software Update > Download and install.
- As with other phased rollouts, users might notice a delay of a few hours or days before the update reaches their device.
- A stable Wi-Fi connection and a minimum of 50% battery are recommended before installation.
Upcoming software: One UI 8 with Android 16
The Galaxy Z Flip 5 and Fold 5 are among the devices eligible for One UI 8, which will be based on Android 16.
- The One UI 8 Beta Program is expected to begin in late May or early June 2025, starting in select markets.
- Beta access will initially be limited to specific Galaxy models and regions, before a wider release.
