Motorola StarTAC Owner's Manual page 133

What kinds of phones are in question?
Questions have been raised about hand-held mobile
phones, the kind that have a built-in antenna that is
positioned close to the user's head during normal
telephone conversation. These types of mobile phones are
of concern because of the short distance between the
phone's antenna—the primary source of the RF—and the
person's head. The exposure to RF from mobile phones in
which the antenna is located at greater distances from the
user (on the outside of a car, for example) is drastically
lower than that from hand-held phones, because a person's
RF exposure decreases rapidly with distance from the
source. The safety of so-called "cordless phones," which
have a base unit connected to the telephone wiring in a
house and which operate at far lower power levels and
frequencies, has not been questioned.
How much evidence is there that hand-
held mobile phones might be harmful?
Briefly, there is not enough evidence to know for sure, either
way; however, research efforts are on-going. The existing
scientific evidence is conflicting and many of the studies
that have been done to date have suffered from flaws in
their research methods. Animal experiments investigating
the effects of RF exposures characteristic of mobile phones
have yielded conflicting results. A few animal studies,
however, have suggested that low levels of RF could
accelerate the development of cancer in laboratory animals.
In one study, mice genetically altered to be predisposed to
developing one type of cancer developed more than twice
as many such cancers when they were exposed to RF
energy compared to controls. There is much uncertainty
among scientists about whether results obtained from
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