You forgot an important detail from your physics classes: the electric field inside a Faraday cage is only zero when it's exposed to static electric fields. Cha

You forgot an important detail from your physics classes: the electric field inside a Faraday cage is only zero when it's exposed to static electric fields. Changing electric fields, like radio waves, can pass through, although they'll be attenuated. Also, if you place an electric charge inside a Faraday cage, it will cause an electric field outside the cage, and the electric field inside the cage will still be zero.