Downloading an image displaying it won't work on Android

Hi, I have a script that downloads my image to a texture and converts it to a sprite to display on a Unity UI image. It works well in the editor and all seems to be fine, It downloads and displays the image correctly but as the title says when I build to android the Image never displays. Could somebody take a look at my script and see if there's any reason as to why it won't work?

Just to clarify the build does have "full Network Access" I have also tried adding the "http" after as I read that it gets dropped. It works neither way.

Here's the script.

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class AccountGetter : MonoBehaviour {
     
     public string url = "www.gdurl.com/jMu9";
     public Text fail;
 
     IEnumerator Start() {
         //Create a new texture2D
         Texture2D tex;
         tex = new Texture2D(4, 4, TextureFormat.DXT1, false);
         //Grab the image from the web
         WWW www = new WWW("http://" + url);
         //Wait for the download
         yield return www;
         //Load the image to the texture 2D
         www.LoadImageIntoTexture(tex);
            
         //Simple check to see if there's indeed a texture available
         if (www != null) {
             //Construct a new Sprite
             Sprite sprite = new Sprite ();     
             //Create a new sprite using the Texture2D from the url. 
             sprite = Sprite.Create (tex, new Rect (0, 0, 977, 1425), Vector2.zero); 
             //Assign the sprite to the Image Component
             GetComponent<UnityEngine.UI.Image> ().sprite = sprite;  
         } else {
             fail.GetComponent<Text> ().enabled = true;
             fail.text = "FAILED TO DOWNLOAD";
         }            
     }
 }
 

Thanks for looking.