For socket have used URLSessionWebSocketTask, it is working on watchOS6 when connected with phone. But on independent watch with LTE it is not working. we are getting ErrorDomain=NSURLErrorDomain=-1009, "there is no connection to the internet".
Are you building an audio streaming app? This matters, as explained in Low-Level Networking on watchOS.URLSessionWebSocketTask not working on watchOS with LTE
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@apple.com"