Location mapping of a mobile number,AT command

I have two questions,

:?:first, i want to map the current location of a mobile number from which i receive a call.i want to do this using C#.NET.map the location on a google map.
plz help me.......

:?:second, my NOKIA 6300 mobile phone didn't support the AT command for read and list received messages.It produces an ERROR .plz help me .....


very urgent................


and one more question, I have a problem in my C#.NET coding to send msgs using Serial port communication,
I attached my coding below.
there is no error in coding.but every time i run the code,it shows "port is not connected".plz send me the correct coding.

coding:

SerialPort p=new SerialPort();
private void Form1_Load(object sender, EventArgs e)
{
try
{


p.PortName = "COM9";
p.BaudRate = 460800;
p.DataBits = 8;
p.StopBits = StopBits.One;
p.Parity = Parity.None;
p.ReadTimeout = 300;
p.WriteTimeout = 300;
p.Open();
p.DtrEnable = true;
p.RtsEnable = true;
}
catch (Exception ex)
{
throw ex;
}

p.Write("AT\r\n");
String s1 = p.ReadLine();
if (s1.Equals ("OK"))
{
MessageBox.Show("Port is connected");
}
else
MessageBox.Show("Port is not connected");
}

private void button1_Click(object sender, EventArgs e)
{
// p.write("");

p.Write("at+cmgf=1\r\n");
p.Write("at+cmgs=\"+919842798108\"\r\n");

p.Write("Test message ");
SendKeys.Send("^(z)");

String s2 = p.ReadLine();
if (s2.Equals("OK"))
{
MessageBox.Show("Message Sent");
}
else
MessageBox.Show("Message not sent");
}
}
}

hi, about ur last question....

in .Net, try to use multi threading for UART....
it works....

**broken link removed**