Efficient Use - Sony Ericsson Z520a User Manual

Important Information
Antenna
Only use an antenna that has been specifically designed
by Sony Ericsson for your mobile phone. Use of
unauthorized or modified antennas could damage your
mobile phone and may violate regulations, causing
loss of performance and SAR levels above the
recommended limits (see below).

Efficient Use

Hold your mobile phone as you would any other phone.
Do not cover the top of the phone when in use, as
this affects call quality and may cause the phone
to operate at a higher power level than needed, thus
shortening talk and standby times.
Radio Frequency (RF) Exposure
and SAR
Your mobile phone is a low-power radio transmitter and
receiver. When it is turned on, it emits low levels of
radio frequency energy (also known as radio waves
or radio frequency fields).
Governments around the world have adopted
comprehensive international safety guidelines,
developed by scientific organizations, e.g. ICNIRP
(International Commission on Non-Ionizing Radiation
Protection) and IEEE (The Institute of Electrical and
Electronics Engineers Inc.), through periodic and
thorough evaluation of scientific studies. These
guidelines establish permitted levels of radio wave
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exposure for the general population. The levels include
a safety margin designed to assure the safety of all
persons, regardless of age and health, and to account
for any variations in measurements.
Specific Absorption Rate (SAR) is the unit of
measurement for the amount of radio frequency energy
absorbed by the body when using a mobile phone.
The SAR value is determined at the highest certified
power level in laboratory conditions, but the actual SAR
level of the mobile phone while operating can be well
below this value. This is because the mobile phone is
designed to use the minimum power required to reach
the network.
Variations in SAR below the radio frequency exposure
guidelines do not mean that there are variations in
safety. While there may be differences in SAR levels
among mobile phones, all Sony Ericsson mobile phone
models are designed to meet radio frequency exposure
guidelines.
Before a phone model is available for sale to the public,
it must be tested and certified to the FCC that it does
not exceed the limit established by the government-
adopted requirement for safe exposure. The tests are
performed in positions and locations (that is, at the
ear and worn on the body) as required by the FCC for
each model. For body worn operation, this phone has
been tested and meets FCC RF exposure guidelines
when the handset is positioned a minimum of 15 mm
from the body without any metal parts in the vicinity