Cant connect to internet server on android

I cannot connect to a internet server with android. Tho this gives false, which is good: Application.internetReachability == NetworkReachability.NotReachable

But when trying to execute this snippet:

 IEnumerator testConnection() {
         WWW www = new WWW("www.google.com", null, header);
         yield return www;
         // check for errors
         if (www.error == null) {
             util.debug("works");
         } else {
             // www.error and www.text both are empty
             util.debug("testing: WWW Error: " + www.error + www.text); 
         }
     }

it works via unity editor and windows executable, but not on my android device (v 6) Is there a known solution to this?

Edit: Ping also seem to work:

 IEnumerator PingGoogle() {
     Ping googPing  = new Ping("172.217.6.195");
    
     while (!googPing.isDone) {
         yield return googPing;
     }
     util.debug("ping works: " + googPing.time); //I reach this point with the app
 }