Hi there! I understand you're having trouble logging into the First Port City Bank app on your Android device. Let's see if we can get this sorted out together.

First, could you tell me a bit more? For example:
- Are you receiving any specific error messages when trying to log in?
- Have you been able to log in before on this device, or is this your first time?
- Have you recently changed your password or any security settings?

Meanwhile, here are some basic steps you can try to resolve common login issues:

1. Verify Your Credentials: Double-check that your username and password are entered correctly. Sometimes a small typo can block access. Passwords are case-sensitive, so ensure caps lock is off.

2. Reset Password: If you're unsure about your password, try resetting it through the "Forgot Password" option in the app or on the bank’s website. That can refresh your login credentials.

3. Update the App: Make sure your First Port City Bank app is updated to the latest version from the Google Play Store since outdated versions might cause login issues.

4. Clear Cache and Data: On your Android 10 device, go to Settings > Apps > First Port City Bank app > Storage, then clear cache and data. This resets the app's temporary files that might be causing login problems.

5. Check Network Connection: Confirm you have a stable internet connection, whether Wi-Fi or mobile data; unstable connectivity can disrupt login attempts.

If these steps don't help, there might be something more specific going on with your account or device settings.

Would you like me to guide you through any of these steps? Also, let me know if you noticed any particular error messages during login. That info will help narrow down the issue!