diff --git a/.expo/packager-info.json b/.expo/packager-info.json
new file mode 100644
index 00000000..78bc0fd3
--- /dev/null
+++ b/.expo/packager-info.json
@@ -0,0 +1,9 @@
+{
+  "expoServerPort": 19000,
+  "packagerPort": 19001,
+  "packagerPid": 6116,
+  "devToolsPort": 19002,
+  "expoServerNgrokUrl": "https://vc-2j2.anonymous.massa.exp.direct",
+  "packagerNgrokUrl": "https://packager.vc-2j2.anonymous.massa.exp.direct",
+  "ngrokPid": 9708
+}
\ No newline at end of file
diff --git a/.expo/settings.json b/.expo/settings.json
new file mode 100644
index 00000000..8fc14b98
--- /dev/null
+++ b/.expo/settings.json
@@ -0,0 +1,9 @@
+{
+  "hostType": "tunnel",
+  "lanType": "ip",
+  "dev": true,
+  "strict": false,
+  "minify": false,
+  "urlType": "exp",
+  "urlRandomness": "vc-2j2"
+}
\ No newline at end of file
diff --git a/README.md b/README.md
index 6d29bafc..f01aab9e 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,10 @@ Change Directory To Massa
   $ npm install
   $ npm start
 ```
+If Not Worked
+```
+  $ expo start  
+```
 ## Screenshots
 ![ss](https://user-images.githubusercontent.com/17242746/47492102-db776200-d869-11e8-9a06-d2a48ffdcb3d.png)
 
diff --git a/app.json b/app.json
index 879b493e..6f731c5d 100644
--- a/app.json
+++ b/app.json
@@ -22,6 +22,9 @@
     },
     "ios": {
       "supportsTablet": true
+    },
+    "android": {
+      "package": "com.test.testa"
     }
   }
 }
diff --git a/js/App.js b/js/App.js
index 204ac9a3..c7504ca5 100644
--- a/js/App.js
+++ b/js/App.js
@@ -1,8 +1,7 @@
 /* @flow */
 
 import React from 'react';
-import { Constants, ScreenOrientation } from 'expo';
-
+import { Constants, ScreenOrientation , Permissions, Notifications} from 'expo';
 ScreenOrientation.allow(ScreenOrientation.Orientation.ALL);
 
 import {
@@ -20,6 +19,7 @@ import Banner from './Banner';
 import SimpleStack from './SimpleStack';
 import SimpleTabs from './SimpleTabs';
 import TabAnimations from './TabAnimations';
+
 const ExampleRoutes = {
   SimpleStack: {
     name: 'Massa Login',
@@ -34,12 +34,47 @@ const ExampleRoutes = {
     description: 'To see invited friends and their download progress as well as chat with them',
     screen: SimpleTabs,
   }};
+
+  
 class MainScreen extends React.Component<*> {
+  constructor(props) {
+    super(props);
+    
+  }
+   componentDidMount = () => {
+    this.getGCMToken();
+   }
+  getGCMToken = async() => {
+    const { status: existingStatus } = await Permissions.getAsync(
+      Permissions.NOTIFICATIONS
+    );
+    let finalStatus = existingStatus;
+  
+    // only ask if permissions have not already been determined, because
+    // iOS won't necessarily prompt the user a second time.
+    if (existingStatus !== "granted") {
+      // Android remote notification permissions are granted during the app
+      // install, so this will only ask on iOS
+      const { status } = await Permissions.askAsync(Permissions.NOTIFICATIONS);
+      finalStatus = status;
+    }
+  
+    // Stop here if the user did not grant permissions
+    if (finalStatus !== "granted") {
+      return;
+    }
+  
+    // Get the token that uniquely identifies this device
+    let token = await Notifications.getExpoPushTokenAsync();
+    
+  }
   render() {
     const { navigation } = this.props;
 
     return (
+      
       <View style={{ flex: 1 }}>
+      <StatusBar hidden />
         <ScrollView style={{ flex: 1 }}>
           <Banner />
           {Object.keys(ExampleRoutes).map((routeName: string) => (
diff --git a/package.json b/package.json
index 4bdede96..7cc84f6c 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "main": "./node_modules/react-native-scripts/build/bin/crna-entry.js",
+  
   "scripts": {
     "postinstall": "rm -rf node_modules/react-navigation/{node_modules,examples}",
     "start": "react-native-scripts start",
@@ -14,7 +15,7 @@
   "dependencies": {
     "expo": "^26.0.0",
     "react": "16.0.0",
-    "react-native": "^0.51.0",
+    "react-native": "^0.54.2",
     "react-navigation": "^1.0.0-beta.23"
   },
   "devDependencies": {