It's really weird to me to see so many people discussing Amber Alert spam when I can count on one hand the number of alerts I've received in my lifetime
I've had them on a flight while flying over Ohio. Really terrifying when there's suddenly 100 phones screaching in the cabin and it takes a few seconds to realize that distributed alarms like that must be an amber alert.
Didn't even realize you could get them on a flight. Must be because of the in-flight wifi.
It has nothing to do with Wi-Fi. If people leave their phones on, not in Airplane Mode, while in the cabin they could well receive the alert from any cellular service area they are flying over. And it doesn't have to be an Amber alert, it could be a wireless emergency alert for anything.