How many mm of lead do you need to block the radiation from a regular mobile(cell) phone ?
You don't need much. Honestly, the radiation from the phone is non-ionizing radiation. The radioactive materials from cigarettes have more energy. Why tobacco takes a lot of stuff from the soil including the naturally occurring radioactive materials.
Radiation of mobile phone is all ~900MHz EM radiation. Common cooking aluminum foil will shield the 'radiation' 100%
