Re:WiFi without internet on a Southwest flight
by xcrunner529 on Friday September 29, 2023 @11:12PM
(#37712510)
At least for iOS iMessage uses the same push notification endpoint so really you get iMessage plus any push notifications.
It's interesting what does and doesn't go through. e.g. Facebook notifications update, but not the content. I guess that's because they use the same channel as FB Messenger.