What happens if I disable IS_GCM_ENABLED key to false in Google-Service-info.plist

Question

I have application which has Firebase Push Notifications.

I changed IS_GCM_ENABLED key to false in Google-Service-info.plist on Xcode.

But push notifications works perfectly and why push notification works even I changed key to false?

Could you explain for what we use these keys in Google-Service-info.plist IS_GCM_ENABLED, IS_SIGNIN_ENABLED, IS_APPINVITE_ENABLED, IS_ANALYTICS_ENABLED, IS_ADS_ENABLED,

As I know GCM changed to FCM and Why in Google-Service-info.plist we use IS_GCM_ENABLED not IS_FCM_ENABLED?

Why IS_FCM_ENABLED key doesn't exists in Google-Service-info.plist?

Answer 1

IS_GCM_ENABLED is related to the both - FCM/GCM function services.

Other fields:

IS_APPINVITE_ENABLED - for App Invites feature services

IS_ANALYTICS_ENABLED - for Google Analytics feature services. More discussion here

IS_ADS_ENABLED - for Google Ads feature services

Unfortunately, there is no much public documentation about this. But Firebase has great support. They provided me with all the necessary information.