Nokia 2170 - Manual (Page 66)

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Persons with pacemakers:
Should always keep the phone more than 6 inches (20 cm) from
their pacemaker when the phone is switched on;
Should not carry the phone in a breast pocket;
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,
switch off your phone immediately.
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.
Other Medical Devices
Operation of any radio transmitting equipment, including wireless
phones, may interfere with the functionality of inadequately
protected medical devices. Consult a physician or the
manufacturer of the medical device to determine if they are
adequately shielded from external RF energy or if you have any
questions. Switch off your phone in health care facilities when any
regulations posted in these areas instruct you to do so. Hospitals
or health care facilities may be using equipment that could be
sensitive to external RF energy.
Vehicles
RF signals may affect improperly installed or inadequately shielded
electronic systems in motor vehicles (e.g. electronic fuel injection
systems, electronic anti-skid (anti-lock) braking systems, electronic
speed control systems, air bag systems). 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
Switch your phone off in any facility where posted notices so
require.