GPS coordinates not changing at all!

I am re-creating pokemon go in unity 3D, and I have had trouble with Unity's GPS tracking system. It gets my location, but when i drive/walk it doesnt change! it stays at its starting position. Here is my code :

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 public class GPSTracking : MonoBehaviour {
 
     public void Start()
     {
      
         StartCoroutine(UpdatePosition());
     }
     IEnumerator UpdatePosition()
     {
         if (!Input.location.isEnabledByUser)
             GameObject.Find("Failed Text").GetComponent<Text>().text = "You didnt enable device location!!!";
 
         // Start service before querying location
 
         Input.location.Start();
 
         int maxWait = 20;
           while (Input.location.status == LocationServiceStatus.Initializing && maxWait > 0)
          {
             yield return new WaitForSeconds(1);
            maxWait--;
         }
 
                if (maxWait < 1)
              {
             GameObject.Find("Failed Text").GetComponent<Text>().text = "Didnt initilice within 20 seconds!! ";
             yield break;
          }
 
         //    // Connection has failed
         if (Input.location.status == LocationServiceStatus.Failed)
         {
             GameObject.Find("Failed Text").GetComponent<Text>().text = "Unable to determine device location";
             yield break;
         }
         else
         {
          
             // Access granted and location value could be retrieved
             print("Location: " + Input.location.lastData.latitude + " " + Input.location.lastData.longitude + " " + Input.location.lastData.altitude + " " + Input.location.lastData.horizontalAccuracy + " " + Input.location.lastData.timestamp);
             this.transform.position = new Vector3 (Input.location.lastData.latitude, Input.location.lastData.altitude, Input.location.lastData.longitude *) * Time.deltaTime * speed;
 
             GameObject.Find("Cord Text").GetComponent<Text>().text = this.transform.position.x + " : " + this.transform.position.y + " : " + this.transform.position.z;
         }
         StartCoroutine(UpdatePosition());
         // Stop service if there is no need to query location updates continuously
         //Input.location.Stop();
     }
     public float speed;
 }