LG D520 - Manual (Page 127)

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Hearing Aids
Some digital wireless phones may interfere with some hearing aids. In the
event of such interference, you may want to consult your service provider (or
call the customer service line to discuss alternatives).
Other Medical Devices
If you use any other personal medical device, consult the manufacturer of your
device to determine if it is adequately shielded from external RF energy. Your
physician may be able to assist you in obtaining this information.
Health Care Facilities
Turn your phone OFF in health care facilities when any regulations posted in
these areas instruct you to do so. Hospitals or health care facilities may use
equipment that could be sensitive to external RF energy.
Vehicles
RF signals may affect improperly installed or inadequately shielded electronic
systems in motor vehicles. Check with the manufacturer or its representative
regarding your vehicle. You should also consult the manufacturer of any
equipment that has been added to your vehicle.
Posted Facilities
Turn your phone OFF in any facility where posted notices so require.
Aircraft
FCC regulations prohibit using your phone while in the air. Switch OFF your
phone before boarding an aircraft.
Blasting Areas
To avoid interfering with blasting operations, turn your phone OFF when in a
“blasting area” or in areas posted: “Turn off two-way radio”. Obey all signs and
instructions.
Potentially Explosive Atmosphere
Turn your phone OFF when in any area with a potentially explosive atmosphere
and obey all signs and instructions. Sparks in such areas could cause an
explosion or fire resulting in bodily injury or even death.