WebClient wbcRingtone = new WebClient();

// Add a user agent header in case the requested URI contains a query.

wbcRingtone.Headers.Add("user-agent","Mozilla/4.0(compatible;MSIE 6.0;Windows NT 5.2; .NET CLR 1.0.3705;)");
wbcRingtone.QueryString.Add("user","xxxxxxxx");
wbcRingtone.QueryString.Add("password","xxxxxxxx");
wbcRingtone.QueryString.Add("api_id", "xxxxxxxxxx");

//wbcRingtone.QueryString.Add("msg_type", "SMS_NOKIA_RTTL");
wbcRingtone.QueryString.Add("to", cellNo);

////wbcRingtone.QueryString.Add("text", "Flintstone:d=4,o=5,b=200:g#,c#,8p,c#6,8a#,g#,c#,8p,g#,8f#,8f,8f,8f#,8g#,c#,d#,2f,2p,g#,c#,8p,c#6,8a#,g#,c#,8p,g#,8f#,8f,8f,8f#,8g#,c#,d#,2c#");

wbcRingtone.QueryString.Add("from", "xxxxxxxxx");
wbcRingtone.QueryString.Add("mms_subject", "xxxxxxxxx");
wbcRingtone.QueryString.Add("mms_class", "xxxxxx");
wbcRingtone.QueryString.Add("mms_expire", "xxxxxxx");
wbcRingtone.QueryString.Add("mms_from", "xxxxxxxxx");
wbcRingtone.QueryString.Add("mms_url", "http://www.some.com/folder/mms.mms");

//string baseURL = "http://api.clickatell.com/http/sendmsg";

string baseURL = "http://api.clickatell.com/mms/ind_push.php";
Stream data = wbcRingtone.OpenRead(baseURL);
StreamReader reader = new StreamReader(data);

string s = reader.ReadToEnd();
data.Close();
reader.Close();

string queryURL = GetQueryForMMS(s);

return queryURL;