title: Google Firebase Push Notifications for iOS are not working in production environment
body: <p>I'm using Google Firebase Cloud Messaging API (FCM) to send push notifications to my iOS app. 
  <strong>I could get push-notifications working successfully when I test the app on a device with Development provisioning profiles + development push notification(sandbox) certificates.</strong></p>
  
  <p>However I'm unable to get it working on production environment. I made an ad-hoc build with correct production provisioning profiles and production push notification certificates. And synced an IPA file to a device via iTunes for testing (not directly from xcode). Still I can't receive push notifications from firebase console.</p>
  
  <p>I have uploaded correct development and production certificates (with private keys) to firebase as well. I've double checked every possible step that could go wrong but, still can't find the issue. <strong>Is there a way to troubleshoot this issue? Or isn't it possible to get production environment notifications to an AdHoc build?</strong></p>