Health and safety information39to repair, replace or recall the phones so that the hazardno longer exists.Although the existing scientific data do not justify FDAregulatory actions, FDA has urged the wireless phoneindustry to take a number of steps, including thefollowing:Support needed research into possible biological effects ofRF of the type emitted by wireless phones;Design wireless phones in a way that minimizes any RFexposure to the user that is not necessary for devicefunction; andCooperate in providing users of wireless phones with thebest possible information on possible effects of wirelessphone use on human healthFDA belongs to an interagency working group of thefederal agencies that have responsibility for differentaspects of RF safety to ensure coordinated efforts at thefederal level. The following agencies belong to thisworking group:National Institute for Occupational Safety and HealthEnvironmental Protection Agency Federal CommunicationsCommissionOccupational Safety and Health AdministrationNational Telecommunications and InformationAdministrationThe National Institutes of Health participates in someinteragency working group activities, as well.FDA shares regulatory responsibilities for wireless phoneswith the Federal Communications Commission (FCC). Allphones that are sold in the United States must complywith FCC safety guidelines that limit RF exposure. FCCrelies on FDA and other health agencies for safetyquestions about wireless phones.FCC also regulates the base stations that the wirelessphone networks rely upon. While these base stationsoperate at higher power than do the wireless phonesthemselves, the RF exposures that people get from thesebase stations are typically thousands of times lower thanthose they can get from wireless phones. Base stationsare thus not the primary subject of the safety questionsdiscussed in this document.What is FDA doing to find out more about the possiblehealth effects of wireless phone RF?FDA is working with the U.S. National Toxicology Programand with groups of investigators around the world to