This study indicates it is not possible at present to say that exposure to radio frequency radiation, even at levels below national guidelines, is totally without potential adverse health effects. - GreenMedInfo Summary

Cellular phone use began in the United Kingdom in 1985. Sales increased slowly until 1992, more rapidly to 1997, before substantial growth to 2005 (figure).1 The UK Stewart Report2 into cellular phones and health concluded: “It is not possible at present to say that exposure to radio frequency radiation, even at levels below national guidelines, is totally without potential adverse health effects, and that the gaps in knowledge are sufficient to justify a precautionary approach.”