Samsung has begun releasing a second October 2026 update for the Galaxy Z Fold 8 Ultra, Galaxy Z Fold 8, and Galaxy Z Flip 8, following the earlier security patch that expanded from South Korea to Europe and India.
According to SamMobile, the newer firmware is initially available in South Korea, but Samsung hasn't explained exactly what it changes.
That means there are now two distinct October updates to track. The first delivered the October 2026 security patch and expanded internationally. The second is a separate firmware release, apparently focused on internal improvements, although its specific fixes remain unconfirmed.
The latest rollout covers the Galaxy Z Fold 8 Ultra, Galaxy Z Fold 8, and Galaxy Z Flip 8. Build numbers, download sizes, and availability vary by model and region. Owners can check manually under Settings > Software update > Download and install rather than waiting for a notification.
Here's where both updates stand, what the widely cited 62 security fixes mean, and why neither release should be confused with the upcoming One UI 9.5 feature update.
Where the Galaxy Z Fold 8 and Z Flip 8 October update is available
Samsung began pushing the first October security patch on Oct. 2 in South Korea, covering the Z Fold 8 Ultra, Z Fold 8, and Z Flip 8. At that point, Samsung hadn't detailed the patch's security fixes.
By Oct. 7, the rollout had expanded to Europe and India, among the first regions outside South Korea to receive it. SamMobile's rollout report cited 62 fixed security issues.
That figure describes the October security patch as a whole, not 62 separately confirmed vulnerabilities affecting every individual model. The number also shouldn't be confused with the changes in Samsung's second October firmware release.
Build details differ across models and regions. The standard Z Fold 8 update in Europe and India was reported at 537.17MB under firmware F9763XXS3AZIJ, while the Fold 8 Ultra update in South Korea measured 5,298.47MB under firmware F976NKSS3AZIJ.
Those figures apply to different models and regional builds. The much larger download doesn't, by itself, establish that the Fold 8 Ultra received additional features or security fixes.
SamMobile didn't provide a confirmed package size or full firmware number for the Z Flip 8 in its international rollout report. Owners shouldn't assume their download will match another device's figures.
The second October update introduces another build to watch. SamMobile reports that the Galaxy Z Fold 8 Ultra's newer South Korean firmware is F976NKSU3AZJ8, with a download size of 687.54MB.
Samsung has also begun distributing this second update to the standard Z Fold 8 and Z Flip 8 in South Korea. However, the report doesn't establish an exact international release date or list equivalent firmware numbers for every model.
If you own one of these foldables, check Settings > Software update > Download and install. If an update appears, review the version and changelog shown on your phone before installing it.
What the second October update changes
The distinction between the two October releases matters because they don't have the same documented purpose.
The first update delivered the October 2026 security patch. The subsequent firmware release appears to contain internal improvements, but Samsung hasn't published a detailed explanation of its changes.
SamMobile reported that the second update arrived shortly after Samsung began issuing another October firmware update for the Galaxy S26 series. Both appear to focus on changes behind the scenes rather than announced new features.
That doesn't establish whether the foldable update addresses stability, performance, battery life, or a particular bug. Without an official changelog identifying those changes, none should be treated as confirmed.
The second update also shouldn't be described as another package of 62 security fixes. That figure belongs to the earlier October security patch, and the latest reporting doesn't provide a separate vulnerability count for the newer firmware.
If your phone already received the October security patch, it may still receive this second update when Samsung expands availability to your market.
Why this isn't the One UI 9.5 update some owners are waiting for
Both October updates run on a separate track from the larger feature release foldable owners have been anticipating.
Internal One UI 9.5 builds appeared on Samsung's servers for the Galaxy Z Fold 8, Fold 8 Ultra, and Z Flip 8 in September, indicating that testing had started. SamMobile reported that the devices were among those being prepared for Samsung's next interface update.
That's internal testing, not a public rollout.
Samsung hasn't confirmed a public One UI 9.5 beta or stable release date for the foldable lineup. SamMobile suggested that beta testing could begin later in 2026 or early in 2027, but that remains an expectation rather than an announced schedule.
One UI 9.5 is expected to debut alongside the Galaxy S27 series in 2027. It isn't expected to introduce a new Android version to the Galaxy Z Fold 8 or Z Flip 8, which already run One UI 9 based on Android 17.
The update could still bring substantial interface and feature changes. Samsung's recent software approach separates major Android-version upgrades from intermediate One UI releases that introduce additional functionality.
Neither October firmware release confirms that One UI 9.5 is closer to public availability. Installing the latest security or maintenance update doesn't change the company's unannounced beta and stable rollout schedule.
What to do now
Check Settings > Software update > Download and install on your Galaxy Z Fold 8 Ultra, Z Fold 8, or Z Flip 8.
If an update is available, review the firmware version and install it as routine software maintenance. The first October release delivered the month's security patch, while the newer release appears to include internal improvements that Samsung hasn't detailed.
Don't expect either update to bring One UI 9.5 features. That version remains in development, with no public beta or stable release date confirmed for these devices.
Treat regional rollout reports as confirmation that Samsung has started distributing an update, not proof that every country, carrier, or model has received it.
If your device hasn't shown the second October update yet, it may simply be waiting for the next stage of Samsung's rollout. Check again later rather than assuming there's a problem with your phone.
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