228 Section 4A: Important Safety Information
Radiofrequency (RF) Energy
Understanding How Your Phone Operates
Your phone is basically a radio transmitter and receiver. When it’s turned
on, it receives and transmits radiofrequency (RF) signals. When you use
your phone, the system handling your call controls the power level. This
power can range from 0.006 watts to 0.2 watts in digital mode.
Knowing Radiofrequency Safety
The design of your phone complies with updated NCRP standards
described below.
In 1991–92, the Institute of Electrical and Electronics Engineers (IEEE) and
the American National Standards Institute (ANSI) joined in updating ANSI’s
1982 standard for safety levels with respect to human exposure to RF
signals. More than 120 scientists, engineers and physicians from
universities, government health agencies and industries developed this
updated standard after reviewing the available body of research. In 1993,
the Federal Communications Commission (FCC) adopted this updated
standard in a regulation. In August 1996, the FCC adopted hybrid standard
consisting of the existing ANSI/IEEE standard and the guidelines published
by the National Council of Radiation Protection and Measurements (NCRP).
Body-Worn Operation
To maintain compliance with FCC RF exposure guidelines, if you wear a
handset on your body, use the Sprint-supplied or Sprint-approved carrying
case, holster, or other body-worn accessory. If you do not use a body-worn
accessory, ensure the antenna is at least 2.2 centimeters from your body
when transmitting. Use of non-Sprint-approved accessories may violate
FCC RF exposure guidelines.
For more information about RF exposure, visit the FCC Web site at
www.fcc.gov.
Specific Absorption Rate (SAR) for Wireless Phones
The SAR is a value that corresponds to the relative amount of RF energy
absorbed in the head of a user of a wireless handset.
The SAR value of a phone is the result of an extensive testing, measuring
and calculation process. It does not represent how much RF the phone
emits. All phone models are tested at their highest value in strict laboratory
settings. But when in operation, the SAR of a phone can be substantially
less than the level reported to the FCC. This is because of a variety of factors
including its proximity to a base station antenna, phone design and other
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