Cell Phone in bra, shirt pocket or pants back pocket

The issue is close, repeated body contact with a radiofrequency source. Radiofrequency electromagnetic fields are non-ionizing, meaning they do not damage DNA in the same direct way as x-rays or gamma rays. NCI reviews note that human studies have not shown consistent evidence of increased cancer risk, though research continues because exposure patterns change over time. Carrying a phone against the body may increase local exposure compared with holding it away, but a direct cancer mechanism remains unproven. A cautious description is possible indirect risk through long-term close-body radiofrequency exposure, with uncertainty and dose-pattern dependence.