It is probably using cell broadcasts: https://en.wikipedia.org/wiki/Cell_Broadca... | Hacker News

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		nameequalsmain on Sept 23, 2023 \| parent \| context \| favorite \| on: FEMA and FCC Plan Nationwide Emergency Alert Test ... It is probably using cell broadcasts: https://en.wikipedia.org/wiki/Cell_Broadcast

supernova87a on Sept 23, 2023 [–]

Ah, thanks that explains it -- (follow the link also for https://en.wikipedia.org/wiki/Wireless_Emergency_Alerts )

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