A user is experiencing intermittent connection problems with a recently installed application on their company-issued smartphone. The application is essential for work-related tasks and requires a constant internet connection to function properly. The IT department has ruled out issues with the application itself or the phone's hardware. Which of the following settings should the user check first to resolve the connectivity issue?
Turn on 'Near-field communication (NFC)' services.
Update the 'Preferred Roaming List (PRL)'.
Check that 'Mobile device management (MDM)' is configured properly.
Ensure 'Mobile data' is enabled for the smartphone.