A. If you encounter functionality issues, try clearing the app cache. For Android, go to 'Settings' > 'Apps' > 'iD Mobile' > 'Storage' > 'Clear Cache'. For iOS, you may need to uninstall and reinstall the app to clear any cached data.

B. Ensure that your app is updated to the latest version. Go to the app store on your device, search for iD Mobile, and check for updates. Keeping the app updated can resolve many functionality issues.