The app needs to maintain internet communication under the following conditions:
Both Wi-Fi and cellular networks are active. The Wi-Fi network has no internet connection. The cellular network has an active internet connection.
Have a read of Extra-ordinary Networking and the posts it references, especially Running an HTTP Request over WWAN.
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"