a study was conducted in Chicago on the use of mobile phones, reported that within 50 minutes, which is used by a user when talking via mobile phone, is enough to change the brain activity that is closest to the antenna is mounted on the ears of consumers. But authenticity is still under review again .. According to a report from scientists at the National Institute of Health (NH), the situation was not sure yet whether it will cause any damage or not and still do not know whether it has to do with brain cancer or not. Meanwhile according to reports from the NIH expert, Dr. Nora Volkow, will increase glucose metabolism in the brain of a person is exposed to mobile phones and the most significant in the most convenient with the phone's antenna. According to studies carried out showed that the brain sensitive to electromagnetic radiation due tomobile phone usage.