Nokia N91 User Manual page 115

Hearing aids
Some digital wireless devices may interfere with some hearing
aids. If interference occurs, consult your service provider.
Vehicles
RF signals may affect improperly installed or inadequately
shielded electronic systems in motor vehicles such as
electronic fuel injection systems, electronic antiskid
(antilock) braking systems, electronic speed control
systems, air bag systems. For more information, check with
the manufacturer or its representative of your vehicle or
any equipment that has been added.
Only qualified personnel should service the device, or install
the device in a vehicle. Faulty installation or service may
be dangerous and may invalidate any warranty that may
apply to the device. Check regularly that all wireless device
equipment in your vehicle is mounted and operating
properly. Do not store or carry flammable liquids, gases,
or explosive materials in the same compartment as the
device, its parts, or enhancements. For vehicles equipped
with an air bag, remember that air bags inflate with great
force. Do not place objects, including installed or portable
wireless equipment in the area over the air bag or in the air
bag deployment area. If in-vehicle wireless equipment is
improperly installed and the air bag inflates, serious injury
could result.
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Using your device while flying in aircraft is prohibited. Switch
off your device before boarding an aircraft. The use of wireless
teledevices in an aircraft may be dangerous to the operation
of the aircraft, disrupt the wireless telephone network, and
may be illegal.
Potentially explosive environments
Switch off your device when in any area with a potentially
explosive atmosphere and obey all signs and instructions.
Potentially explosive atmospheres include areas where you
would normally be advised to turn off your vehicle engine.
Sparks in such areas could cause an explosion or fire
resulting in bodily injury or even death. Switch off the device
at refuelling points such as near gas pumps at service
stations. Observe restrictions on the use of radio equipment
in fuel depots, storage, and distribution areas, chemical
plants or where blasting operations are in progress. Areas
with a potentially explosive atmosphere are often but not
always clearly marked. They include below deck on boats,
chemical transfer or storage facilities, vehicles using liquefied
petroleum gas (such as propane or butane), and areas where
the air contains chemicals or particles such as grain, dust
or metal powders.