How to get GPS lattitude and longitude values ?

How do we get GPS lattitude and longitude values, i followed the documentation example, but it always say the pos as 0,0,0,0 and the locationservice doesn't seem to be running ??

Is that code given below is correct or do i need to add something more to make it work ??

And if the code is perfect, please help me dubugging whether i need to run the app in android phone or just Unity Remote is enough...

Please suggest. Thank you.

function Start () { // First, check if user has location service enabled if (!Input.location.isEnabledByUser) return;

 // Start service before querying location
 Input.location.Start ();

 // Wait until service initializes
 var maxWait : int = 20;
 while (Input.location.status
        == LocationServiceStatus.Initializing && maxWait > 0) {
     yield WaitForSeconds (1);
     maxWait--;
 }

 // Service didn't initialize in 20 seconds
 if (maxWait < 1) {
     print ("Timed out");
     Debug.Log("Timed out");
     return;
 }

 // Connection has failed
 if (Input.location.status == LocationServiceStatus.Failed) {
     print ("Unable to determine device location");
     Debug.Log("Unable to determine device location");;
     return;
 }
 // Access granted and location value could be retrieved
 else {        
     print ("Location: " + Input.location.lastData.latitude + " " +
            Input.location.lastData.longitude + " " +
            Input.location.lastData.altitude + " " +
            Input.location.lastData.horizontalAccuracy + " " +
            Input.location.lastData.timestamp);
 }

 // Stop service if there is no need to query location updates continuously
 //Input.location.Stop ();

}

function Update() { print(Input.location.status); if(Input.location.status.ToString() == "Stopped" ) { print("IsEnabled" +Input.location.isEnabledByUser); Input.location.Start(); } }