Apple iPhone 4 - Manual (Page 8)

Radio Frequency Interference Radio-frequency emissions from
electronic equipment can negatively affect the operation of other
electronic equipment, causing them to malfunction. Although iPhone is
designed, tested, and manufactured to comply with regulations governing
radio frequency emission in countries such as the United States, Canada,
the European Union, and Japan, the wireless transmitters and electrical
circuits in iPhone may cause interference in other electronic equipment.
Therefore, please take the following precautions:
Aircraft Use of iPhone may be prohibited while traveling in aircraft.
For more information about using Airplane Mode to turn off the iPhone
wireless transmitters, see the iPhone User Guide.
Vehicles Radio frequency emissions from iPhone may affect electronic
systems in motor vehicles. Check with the manufacturer or its
representative regarding your vehicle.
Pacemakers The Health Industry Manufacturers Association recommends
that a minimum separation of 15 cm (6 inches) be maintained between a
handheld wireless phone and a pacemaker to avoid potential interference
with the pacemaker. Persons with pacemakers:
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Should always keep iPhone more than 15 cm (6 inches) from the
pacemaker when the phone is turned on
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Should not carry iPhone in a breast pocket
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Should use the ear opposite the pacemaker to minimize the potential
for interference
If you have any reason to suspect that interference is taking place, turn
iPhone off immediately.
Hearing Aid Compatibility (HAC) iPhone has been tested and rated
under the American National Standard Institute (ANSI) C63.19-2007 hearing
aid compatibility standard. The ANSI standard measures radio frequency
interference for acoustic coupling (“M” rating) and inductive coupling
with hearing aids operating in telecoil mode (“T” rating). Phones must
be rated M3 or greater and T3 or greater to be hearing aid compatible
under FCC rules.
iPhone 4 CDMA model is hearing aid compatible under FCC rules. iPhone 4
GSM model is hearing aid compatible under FCC rules when Hearing
Aid Mode is activated. To activate Hearing Aid Mode on iPhone 4, go
to Settings > General > Accessibility. Activating Hearing Aid Mode may
reduce 2G cellular coverage. For more information, see the “Hearing Aid
Compatibility” section of the iPhone User Guide. For current iPhone hearing
aid compatibility ratings, go to: www.apple.com/support/hac
iPhone may interfere with some hearing aids. If you experience
interference, consult the hearing aid manufacturer or your physician for
alternatives or remedies.
Compatibility With Other Wireless Technologies This phone has been
tested and rated for use with hearing aids for some of the wireless
technologies that it uses. However, there may be some newer wireless
technologies used in this phone that have not been tested yet for use
with hearing aids. It is important to try the different features of this
phone thoroughly and in different locations, using your hearing aid or
cochlear implant, to determine if you hear any interfering noise. Consult
your service provider or the manufacturer of this phone for information