> I wondered if a similar envelope could protect my phone from being located all the time? And maybe that would also protect the phone from EMPs?
Since phones radiate location on the gigahertz freq, I think there would be no effect by wrapping it with metal etc.
Could disabling “Location” still make the phone trackable?
“Since phones radiate location on the gigahertz freq, I think there would be no effect by wrapping it with metal etc.”
Aluminum foil does strongly attenuate radio waves.
I am not sure why you refer to gigahertz as higher frequencies are attenuated more.
The microwave oven door uses a Faraday cage to block the gigahertz radiation.
Note the difference between “shield” and “cage”.