Hi there! Sorry to hear you're having trouble logging into your FAB Banking App. I'd like to help you get this sorted out. To start, could you tell me a bit more about what's happening when you try to log in? For example:

- Are you getting any error messages? If yes, what do they say?
- Are you able to launch the app but just can’t complete the login?
- Did this issue start recently, or has it been ongoing for a while?
- Have you tried any steps already, like restarting your device or reinstalling the app?

Meanwhile, some common fixes we can try include:

1. Check your internet connection: Make sure your device is connected to a stable Wi-Fi or cellular network.
2. Restart your device: Sometimes a simple restart can clear temporary glitches.
3. Clear app cache: On your Android 10 device, you can go to Settings > Apps > FAB Banking App > Storage > Clear Cache.
4. Update the app: Ensure the app is updated to the latest version from the Google Play Store.
5. Reinstall the app: If problems persist, uninstall the app and reinstall it.
6. Verify login credentials: Double-check your username and password for any typos.
7. Check for bank service status: Occasionally, the FAB app experiences intermittent service disruptions. If there's a wider outage, it may be reported on the bank's site or outage trackers.

Once you provide more details or try these steps, we can explore further solutions. Does that sound good?