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• National Telecommunications and Information
Administration
The National Institutes of Health participates in some
interagency working group activities, as well.
The FDA shares regulatory responsibilities for wireless
phones with the Federal Communications Commission
(FCC). All phones that are sold in the United States must
comply with FCC safety guidelines that limit RF exposure.
The FCC relies on the FDA and other health agencies for
safety questions about wireless phones.
The FCC also regulates the base stations that the wireless
phone networks rely upon. While these base stations
operate at higher power than do the wireless phones
themselves, the RF exposures that people get from these
base stations are typically thousands of times lower than
those they can get from wireless phones. Base stations are
thus not the subject of the safety questions discussed in
this document.
3. What kinds of phones are the subject of this update?
The term ‘wireless phone’ refers here to handheld wireless
phones with builtin antennas, often called ‘cell’, ‘mobile’,
or ‘PCS’ phones. These types of wireless phones can
expose the user to measurable radiofrequency energy (RF)
because of the short distance between the phone and the
user’s head. These RF exposures are limited by FCC safety
guidelines that were developed with the advice of the FDA
and other federal health and safety agencies. When the
phone is located at greater distances from the user, the
exposure to RF is drastically lower because a person’s
RF exposure decreases rapidly with increasing distance
from the source. The so-called ‘cordless phones,’ which
have a base unit connected to the telephone wiring in a