Samsung Galaxy S 4 Important Information Manual page 9

Sprint_L720_T_IIB_.book Page 9 Wednesday, September 25, 2013 10:11 PM
evidence has not linked cell phones with any
health problems.
Cell phones emit low levels of Radio Frequency
(RF) energy. Over the past 15 years, scientists
have conducted hundreds of studies looking at
the biological effects of the radio frequency
energy emitted by cell phones. While some
researchers have reported biological changes
associated with RF energy, these studies have
failed to be replicated. The majority of studies
published have failed to show an association
between exposure to radio frequency from a
cell phone and health problems.
The low levels of RF cell phones emit while in
DRAFT For Internal Use Only
use are in the microwave frequency range. They
also emit RF at substantially reduced time
intervals when in the stand-by mode. Whereas
high levels of RF can produce health effects (by
heating tissue), exposure to low level RF that
does not produce heating effects causes no
known adverse health effects.
The biological effects of radio frequency energy
should not be confused with the effects from
other types of electromagnetic energy.
Very high levels of electromagnetic energy,
such as is found in X-rays and gamma rays,
can ionize biological tissues. Ionization is a
process where electrons are stripped away from
their normal locations in atoms and molecules.
Important Safety Information 9