title: FIREBASE WARNING: Using an unspecified index. Consider adding ".indexOn": "mobile" at /accounts to your security rules for better performance
body: <p>I'm facing this issue while fetching data from Firebase:</p>
  
  <pre><code>FIREBASE WARNING: Using an unspecified index. Consider adding ".indexOn": "mobile" at /accounts to your security rules for better performance 
  </code></pre>
  
  <hr>
  
  <pre><code> var ref = new Firebase("https://lxxxxxxx-c7797.firebaseio.com/accounts");
                      ref.orderByChild("mobile").equalTo($scope.mobile).on("child_added", function (snapshot) {
                          //console.log(snapshot.key());
                          $scope.nodeId = snapshot.key();
                          $scope.name = snapshot.val().name;
                          $scope.mobile = snapshot.val().mobile;
  
                      });
  </code></pre>