Yeah someone said to wrap the phone in plastic wrap first to protect it from the foil. That post was in light of the NATIONAL October 4th test at 14:20-14:50 Eastern time.

Though not being able to use your handheld device or entertainment system may cause hysteria, users all over will have to abide by the Federal Emergency Management Agency (FEMA) on October 4th, as all cell phones, televisions, and radios will be going through a nationwide test.

The test will take place at 2:20 p.m. ET on Wednesday, October 4th. Though noises from your electronic device may be loud for a duration of 30 minutes, FEMA will be assessing the nationwide Emergency Alert System as well as Wireless Emergency Alerts.

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Sources have revealed that a voice may also be heard from your device saying something along the lines of, “This is a nationwide test of the Emergency Alert System, issued by the Federal Emergency Management Agency, covering the United States from 14:20 to 14:50 hours ET. This is only a test. No action is required by the public.”

The test itself is to ensure that in case of a national disaster, every electronic device will be notified within a 10-minute period.