In simulator we can’t test in below code using device we can try 1234567970 - example phone number let url: NSURL = URL(string: "TEL://1234567970")! as NSURL UIApplication.shared.open(url as URL, options: [:], completionHandler: nil) We can write above code as one function and call that method in viewdidload. (Or) write above code as it is in viewdidload method.
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