Is mobile a safe device?

hai friend warm welcomes from india,very nice question for our lot friends,i say preferably no for mobile devices, the electro magnetic waves and as well the radio affects the nervous system of human body and their life style and their thinking too,now a days the research indicates that it effect not only the nervous system and the birth of future generation which indirectly effects the heart and the birth of child parts that of elders,please be careful place mobile most in your hand or attend the cell with blooth technology or with head phones which reduces the effect so much than nothing