$.ajax({

 type: "post",
                    url: 'http://' + ip + '/Home/Test',
                    dataType: 'json',
                    data: { Email: email, Password: password, LogIn: true, DeviceID: client_device, OS: OS_Version },
                    success: function (data) {
                        if (data.msg === "1") {
                        }
                    }
                })

<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval'">

<httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Origin" value="*" />
    <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS"/>
    <add name="Access-Control-Allow-Headers" value="Origin, X-Requested-With, Content-Type, Accept" />
  </customHeaders>
</httpProtocol>

[AllowAnonymous]
    public JsonResult LogIn(LogInViewModel User)
    { ........

public class JsonpResult : JsonResult
{
    object data = null;

    public JsonpResult()
    {
    }

    public JsonpResult(object data)
    {
        this.data = data;
    }

    public override void ExecuteResult(ControllerContext controllerContext)
    {
        if (controllerContext != null)
        {
            HttpResponseBase Response = controllerContext.HttpContext.Response;
            HttpRequestBase Request = controllerContext.HttpContext.Request;

            string callbackfunction = Request["callback"];
            if (string.IsNullOrEmpty(callbackfunction))
            {
                throw new Exception("Callback function name must be provided in the request!");
            }
            Response.ContentType = "application/x-javascript";
            if (data != null)
            {
                JavaScriptSerializer serializer = new JavaScriptSerializer();
                Response.Write(string.Format("{0}({1});", callbackfunction, serializer.Serialize(data)));
            }
        }
    }
}

$.ajax({
                type: "post",
                url: 'http://' + ip + '/Home/LogIn',
                jsonp: "callback",
                dataType: 'jsonp',
                data: { Email: email, Password: password, LogIn: true, DeviceID: client_device, OS: OS_Version },
                success: function (data) {
                    if (data.msg === "1") {
                        window.localStorage["email"] = email;
                        window.localStorage["sessionid"] = data.sessionid;
.................