Hi! I see your Libre 2 mobile app stopped working right after a Samsung software update. That timing suggests the update might have affected app functions, which has been reported by some users after the recent One UI (Samsung's interface) version 8 update.

To get started, could you tell me a bit more?
- What specific problem are you seeing? (e.g., app won't open, sensor won’t connect, NFC not working)
- Have you tried restarting your phone or reinstalling the Libre app yet?
- Is your Libre app updated to the latest version from the Play Store?

In the meantime, here’s a quick step-by-step you can try that has helped users facing similar issues:

1. Restart your Samsung phone: Sometimes a fresh boot clears temporary glitches.
2. Check app permissions:
- Go to Settings > Apps > Libre app > Permissions and ensure it has all necessary permissions, especially for location, Bluetooth, and NFC.
3. Battery optimization:
- In Settings > Apps > Libre app > Battery, set it to “Unrestricted” to prevent the app from being killed in the background.
4. Clear the Libre app cache:
- Settings > Apps > Libre app > Storage > Clear Cache.
5. Update the Libre app: Go to the Google Play Store and check that the Libre app is on its latest version—developers often release fixes after OS updates.
6. If you use NFC scanning, make sure NFC is enabled in your phone's settings.

Samsung One UI 8 updates have been known to cause some compatibility issues with Libre apps and NFC in certain phones, so if these steps don’t help, there may be a need for a patch from either Samsung or Abbott (Libre's developer).

Please try these out, and let me know how it goes. If the problem persists, I can help you with some advanced troubleshooting options or direct you to support channels for possible software updates or workarounds.

Are you satisfied with this way forward?