But these new findings don't tell us whether activating the cells artificially, in this case by cell phone radiation, will have a negative effect on health.

CNN: Cell phone exposure increases brain cell activity

The Danish study is prospective in nature, which distinguishes it from most other studies on the health effects of cell phone use, which were case-control studies and enrolled subjects diagnosed with brain tumors and a comparison group of subjects who were free of brain tumors in order to compare reported cell phone usage in the two groups.

FORBES: Do Cell Phones Cause Brain Cancer? The Diehards Cling Desperately To Opinion

Law enforcement in the case she responded to had the cell phone number for a criminal suspect they wanted to arrest.

FORBES: Police Can't Ask Your Mobile Phone Where You Are In Order To Arrest You