Cell phones emit a small amount of radiation to operate. They emit radiofrequency energy, RF, (radio waves) a form of non-ionizing radiation which is a form of electromagnetic radiation. Cell phones are held up near the ear, and therefore the tissues nearest to the antenna can absorb this energy which excites its molecules. When a phone isn’t being used it is always communicating with cell towers which means that there is still energy getting transferred. There are many main factors of RF energy. One of them is the amount of time a person is on the phone and that corresponds with the amount of RF energy that is absorbed from the phone into the body. Another factor is whether or not the person is using speaker mode/hand free or actually holding the phone up to their ear.