Electromagnetic Radiation Emissions by Mobile Devices Under Distinct Ways of Usage

123 mobile phones in the 1.5 GHz-2.1 GHz frequency band are observed for electromagnetic radiation at two distances from the device (0m and 1m) and four distinct ways of usage. Electric field spectra are measured within a seven minute interval. Spectrum measurements minimum, aveage and maximum electric field (Emin,Eave,Emax) are reported.These values range from 0,021 V/m to 15,0 V/m.The Emax spectra peaks are non-systematic,depend on the provider and phone and range between 1,72 GHz and 1,97 GHz. The Emax measurements are compared via box and whiskers plots.The boxplot Q1-Q3 spectra measurements are compared via ANOVA.The measurements between Q1(25%) and Q3 (75 %) quartiles follow the normal distribution while the outliers are more, denser and with higher maximum Emax values at 0m distance (contact with ear) than at 1m away. Through reorganisation of the whole dataset in columns, the four usage ways are compared.Most significant is the usage way of making a call where only the corresponding columns follow the normal distribution.Making a call signifies the emitted electric field.