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A comment on WiFi without internet on a Southwest flight. Parent comment

Re:WiFi without internet on a Southwest flight by benced on Friday September 29, 2023 @02:06AM (#37699844)
I believe this is the approach that Flighty (https://flightyapp.com/) uses to send flight updates while on non-paid Wifi.
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Re:WiFi without internet on a Southwest flight by acwan93 on Friday September 29, 2023 @05:47PM (#37710488)
Flighty leverages the Apple Push Notification Service (APN), which the iMessage infrastructure also uses. It's why you can receive notifications in flight but can't act on them.
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