This tutorial will guide you step by step to enable push notifications for new messages on phpFox Mobile apps
Requirements:
- Mobile API 4.2.1 or newer
Configure Firebase Send ID
Go to AdminCP > Apps > Installed > Mobile API > Settings
- Configure Firebase Sender ID setting with the server Sender Id of your Firebase project. You can get the sender id by going to Firebase App console, then go to Project Settings > Cloud Messaging
 
In case IM server set up on your self hosting
- Add 
Firebase Server Idsetting into AdminCP > Mobile Api > Settings. - Open ssh and go to 
Apps/core-im/server, runnpm installto update dependencies. - Edit 
Apps/core-im/server/config.jsfile and add new config 
firebase: {serverKey: "", senderId: ""}
4. Restart index.js with the command:
forever restartall