There was more than one study about the effects of cell phone usage on human health and you are probably aware that your health may be at risk if you are exposed to the radiation of cell phones on a daily basis.
In order to work properly, cell phones use hazardous non-ionizing type of electromagnetic radiation which is absorbed by human cells and tissues and this exposure can lead to some severe health problems.
Associate Director of the National Institute of Health, National toxicology program, Dr. John Bucher, testified that with just 10 to 12 years exposure and use increasing dramatically, there is a fear of an increase in cancer of the brain, linked to use. Kids have configuration of the skull that allows deeper penetration of the radiation from the cell phones with a potentially greater risk.
In case you are worried about cell phone radiation check this list of top 5 phones to avoid.