Of particular concern to mobile/cellular phone users is the affect of radiation on brain tissues. Even particularly insensitive individuals have reported "hot spots" or headaches when mobile phones are used for more than a couple of minutes, and news media reports indicate the scientific jury is still out about the degree of harm that could be involved. However, users of mobiles report a marked reduction of these unpleasant effects when a Disk or
Angel is attached to the back or side of the phone with an adhesive or with tape. (As close to the antenna as possible.)