This is a poorly concealed advertisement for a "Faraday sleeve", rife with misinformation.
No, cell phones do not communicate with cell towers while powered down. This is fairly easy to verify, and it's telling that the screenshots used as proof have deliberately had all attribution removed...
No, cell phones do not communicate with cell towers while powered down. This is fairly easy to verify, and it's telling that the screenshots used as proof have deliberately had all attribution removed...