www class works fine in android but doesn't work in ios...

I have a function using Unity's WWW class that reads the data from a web server and return's the www.text. Is a easy as that, except that it doesn't work in IOS but works fine in android. In IOS it blocks in cycle while(!www.isDone){ ... }

Here's the function that suppossedly returns the web server content:

 private static string GetHttpRequest(string link){
         WWW www = new WWW(link);
         float elapsedTime = Time.time;
         
         while (!www.isDone){
             if (Time.time >= elapsedTime + 4.0f) {
                 Debug.LogError("HttpRequest Timeout");
                 return "";
             };
         }
         
         if (!www.isDone || !string.IsNullOrEmpty(www.error)) {
               Debug.LogError(string.Format("Error!\n{0}", www.error));
               return "";
         }
         
         string response = www.text;
         return response;
     }

Is there a better way of doing this? without using the WWW class? thanks