///Contributed by Stuart Eastland of RightFile.com

        public static void GetNearest(string key, string mcc, string mnc, string lac, string cid)
        {
            try
            {
                string url = "http://us1.unwiredlabs.com/v2/process.php";
                var httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
                httpWebRequest.ContentType = "application/json; charset=utf-8";
                httpWebRequest.Method = "POST";
 
                using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
                {
                    string json = string.Format("{{ \"token\": \"{0}\", \"radio\": \"gsm\", \"mcc\": {1}, \"mnc\": {2}, \"cells\": [{{ \"lac\": {3}, \"cid\": {4} }}] }}", key, mcc, mnc, lac, cid);
 
                    streamWriter.Write(json);
                    streamWriter.Flush();
                }
 
                var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
                using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
                {
                    string json = streamReader.ReadToEnd();
 
                    var results = JsonConvert.DeserializeObject<dynamic>(json);
                    var status = results.status.Value;
 
                    if (status == "ok")
                    {
                        var balance = results.balance.Value;
                        var lat = results.lat.Value;
                        var lon = results.lon.Value;
                        var accuracy = results.accuracy.Value;
 
                    }
                    else
                    {
                        var message = results.message.Value;
                    }
                }
            }
            catch (Exception ex)
            {
                // handle exception 
            }
        }