Abstract: The inventors have invented a cellular phone case designed to block cellular phone radiation from reaching the user's body. The inventors have identified the proper Faraday cage materials necessary to permit one to use the case on the phone in an effective radiation-blocking manner, during nearly all stages of cell phone use. This feature is an improvement over the prior art. Further, the inventors have disclosed a cell phone made out of a heterogeneous and transparent Faraday-cage material formed by doping Faraday metal nanoparticles directly into said cover or shell, another improvement over the prior art.