A. 1. Check app permissions: Go to 'Settings' > 'Apps' > 'YoHo' > 'Permissions' and ensure it has permission to run in the background. 2. Disable battery optimization: Go to 'Settings' > 'Battery' > 'Battery optimization' and set YoHo to 'Not optimized'.

B. 3. Restart the app: Close YoHo completely and reopen it to see if it resolves the background functionality.