Loss of cell phone reception inside of a building generally indicates that the following two issues may be present: 1. High electromagnetic interference (EMI) environment from dirty electricity that is being generated by electronic products. 2. Shielding and Faraday cage effects from metalwork in the building.

People with Electromagnetic Hypersensitivity (EHS) have the unfortunate choice of suffering Radio Frequency (RF) sickness without electromagnetically screening their homes or to get natural radiation deficiency sickness with the RF protective screening installed, the choice is which sickness is the most tolerable. It is a really bad situation to be in.