Samsung has started rolling out the October 2025 security update for the Galaxy S21 FE. Right now, it is available for users in Vietnam, and it will reach other countries soon. This update comes soon after Samsung began releasing the One UI 8 update for the device.

October 2025 security update for Samsung Galaxy S21 FE arrives with the One UI build version G990EXXSJHYJ4 and is about 300MB in size. Even though it is not very large, it includes important security fixes. The latest security patch addresses over 30 security issues, some of which could put your phone at risk.

October 2025 security update is coming while Samsung is still rolling out One UI 8 for the Galaxy S21 FE. The One UI 8 update started last week, but many users in different countries are still waiting for it. Even though this major UI update is not yet available for everyone, Samsung is making sure devices get the latest security fixes first.

Image via golyigit2025 (X)

This security update rollout shows that Samsung is focused on keeping its users’ phones safe. Installing updates on time is important to protect your phone from security threats and ensure it works well.

To get the update, go to your phone’s Settings >> Software Update >> Download and Install. If you don’t see it right away, don’t worry. Samsung usually releases updates in phases, so it might take a few days to appear on your device.

Galaxy S21 FE users should check for this update and install it as soon as it is available. Keeping your phone updated will not only improve security but also help your device run better with the latest improvements.

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Samsung has started expanding the October 2025 security update for its latest foldable phones, the Galaxy Z Flip 7 and Galaxy Z Fold 7. After first reaching users in Korea, the update is now available in India and Europe. This new update enhances the security and stability of the devices for everyday use.

October 2025 update mainly focuses on improving security and performance. It fixes 34 security issues found in both Android and Samsung’s own software. While there are no new features or major visual changes, the update helps make the phones safer and run more smoothly.

Users of Samsung Galaxy Z Flip 7 and Galaxy Z Fold 7 can identify the latest update by the firmware version ending with AYJ3. Although this update doesn’t bring visible changes, it’s important for maintaining the phone’s security and long-term performance.

Source – Samsung Mobile Press

Samsung’s new foldables come with One UI 8 based on Android 16 right out of the box. The company promises seven years of software updates, which means users will continue to get new features and security patches for a long time.

At the moment, Samsung is preparing the One UI 8.5 update. It will reportedly bring a refreshed design with more dynamic visuals and new features. Notably, this major update will debut with the Galaxy S26 series next year.

To install the latest security patch, go to Settings > Software update > Download and install. If the update is available for your device, it will start downloading automatically. It’s recommended to install this patch to keep your Galaxy Z Flip 7 or Fold 7 secure and running smoothly.

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Samsung has started rolling out the October 2025 security update for the Galaxy S25 series in the USA. The update was already available in some other countries, and now Verizon-locked models in the USA are getting it. The rollout will expand to more carriers in the coming days.

Users of the Samsung Galaxy S25 series can verify the October 2025 security update in the US via One UI build versions given below.

• Galaxy S25 – S931USQS6BYIF
• Galaxy S25 Plus – S936USQS6BYIF
• Galaxy S25 Ultra – S938USQS6BYIF

This update is based on One UI 8 and Android 16. It mainly focuses on improving the phone’s security and performance rather than adding new features. The October 2025 patch fixes 14 security issues found in Android, although 6 of them do not affect Samsung devices.

Image – Samsung Galaxy S25, Plus and Ultra

Along with Google’s fixes, Samsung has added 20 extra security updates that deal with problems found in its own software, One UI. These updates help protect users from possible risks and make their Galaxy phones safer to use.

While this update is mostly about security, Samsung is already working on a bigger update, One UI 8.5. Early test versions of this update have already appeared, showing new AI features, design changes, and other improvements.

Samsung is expected to start the One UI 8.5 Beta Program in late November, allowing some users to try out new features before the official release. For now, Galaxy S25 users should install the latest update to keep their devices secure and running smoothly. To check for the update, go to Settings >> Software update >> Download and install.

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