Call phone Number In swift 3

//Here you can make method of calling functionality.

func callNumber(yourPhoneNumber:String) {

  if let phoneCallURL = URL(string: "tel://\(yourPhoneNumber)") {
    let application:UIApplication = UIApplication.shared
    if (application.canOpenURL(phoneCallURL)) {
        application.open(phoneCallURL, options: [:], completionHandler: nil)
    }
  }
}

Happy Coding :)