Federal officials will run the first nationwide test of the wireless emergency alert system today. It uses a type of alert that can only be sent by the president to cellphones and that you are not able to turn off.
The first messages will be sent at 2:18 p.m. ET.
Bloomberg: “Cell towers will broadcast the message for about 30 minutes and devices that are switched on and in range of an active cell tower will get the message only once during that period.”
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