diff --git a/lib/angular-facebook.js b/lib/angular-facebook.js
index 139c9d0..2c5d3c4 100644
--- a/lib/angular-facebook.js
+++ b/lib/angular-facebook.js
@@ -225,14 +225,6 @@
          * @arg {Boolean} _loadSDK (optional, true by default)
          */
         this.init = function(initSettings, _loadSDK) {
-          // If string is passed, set it as appId
-          if (angular.isString(initSettings)) {
-            settings.appId = initSettings;
-          }
-
-          if(angular.isNumber(initSettings)) {
-            settings.appId = initSettings.toString();
-          }
 
           // If object is passed, merge it with app settings
           if (angular.isObject(initSettings)) {
@@ -257,10 +249,36 @@
             /**
              * This is the NgFacebook class to be retrieved on Facebook Service request.
              */
+
             function NgFacebook() {
-              this.appId = settings.appId;
+              if (typeof settings.appId !== "undefined" && settings.appId !== null) {
+                this.initAppId(settings.appId)
+              }
             }
 
+            NgFacebook.prototype.initAppId = function(appId) {
+              this.appId = $q.when(appId).then(function(data){
+                // If string is passed, set it as appId
+                if (angular.isDefined(data)) {
+                  if (angular.isString(data)) {
+                    return $q.when(data);
+                  }
+
+                  if(angular.isNumber(data)) {
+                    return $q.when(data.toString());
+                  }
+
+                  return $q.when(data);
+                } else {
+                  return $q.when(data);
+                }
+              });
+            };
+
+            NgFacebook.prototype.getAppId = function() {
+              return this.appId;
+            };
+
             /**
              * Ready state method
              * @return {Boolean}
@@ -396,7 +414,7 @@
 
             angular.forEach([
               'subscribe',
-              'unsubscribe',
+              'unsubscribe'
             ], function(name) {
 
               NgFacebook.prototype[name] = function() {
@@ -461,7 +479,8 @@
       '$q',
       '$window',
       '$timeout',
-      function($rootScope, $q, $window, $timeout) {
+      'Facebook',
+      function($rootScope, $q, $window, $timeout,Facebook) {
         // Define global loadDeffered to notify when Service callbacks are safe to use
         loadDeferred = $q.defer();
 
@@ -473,42 +492,48 @@
          */
         $window.fbAsyncInit = function() {
           // Initialize our Facebook app
-          $timeout(function() {
-            if (!settings.appId) {
-              throw 'Missing appId setting.';
-            }
 
-            FB.init(settings);
-
-            flags.ready = true;
-
-            /**
-             * Subscribe to Facebook API events and broadcast through app.
-             */
-            angular.forEach({
-              'auth.login': 'login',
-              'auth.logout': 'logout',
-              'auth.prompt': 'prompt',
-              'auth.sessionChange': 'sessionChange',
-              'auth.statusChange': 'statusChange',
-              'auth.authResponseChange': 'authResponseChange',
-              'xfbml.render': 'xfbmlRender',
-              'edge.create': 'like',
-              'edge.remove': 'unlike',
-              'comment.create': 'comment',
-              'comment.remove': 'uncomment'
-            }, function(mapped, name) {
-              FB.Event.subscribe(name, function(response) {
-                $timeout(function() {
-                  $rootScope.$broadcast('Facebook:' + mapped, response);
+          Facebook.getAppId().then(function(appId){
+            var finalSettings = angular.extend(settings,{appId:appId});
+            $timeout(function() {
+              if (!appId) {
+                throw 'Missing appId setting.';
+              }
+
+              FB.init(finalSettings);
+
+              flags.ready = true;
+
+              /**
+               * Subscribe to Facebook API events and broadcast through app.
+               */
+              angular.forEach({
+                'auth.login': 'login',
+                'auth.logout': 'logout',
+                'auth.prompt': 'prompt',
+                'auth.sessionChange': 'sessionChange',
+                'auth.statusChange': 'statusChange',
+                'auth.authResponseChange': 'authResponseChange',
+                'xfbml.render': 'xfbmlRender',
+                'edge.create': 'like',
+                'edge.remove': 'unlike',
+                'comment.create': 'comment',
+                'comment.remove': 'uncomment'
+              }, function(mapped, name) {
+                FB.Event.subscribe(name, function(response) {
+                  $timeout(function() {
+                    $rootScope.$broadcast('Facebook:' + mapped, response);
+                  });
                 });
               });
+
+              // Broadcast Facebook:load event
+              $rootScope.$broadcast('Facebook:load');
+
+              loadDeferred.resolve(FB);
             });
 
-            // Broadcast Facebook:load event
-            $rootScope.$broadcast('Facebook:load');
 
-            loadDeferred.resolve(FB);
           });
         };