77Hearing aidsSome digital wireless phones may interfere with some hearing aids. Inthe event of such interference, you may want to consult your serviceprovider.Other medical devicesOperation of any radio transmitting equipment, including cellularphones, may interfere with the functionality of inadequately protectedmedical devices. Consult a physician or the manufacturer of the medicaldevice to determine if they are adequately shielded from external RFenergy or if you have any questions. Switch off your phone in healthcare facilities when any regulations posted in these areas instruct youto do so. Hospitals or health care facilities may be using equipmentthat could be sensitive to external RF energy.VehiclesRF signals may affect improperly installed or inadequately shieldedelectronic systems in motor vehicles (e.g. electronic fuel injectionsystems, electronic anti-skid (anti-lock) braking systems, electronicspeed control systems, air bag systems). Check with the manufactureror its representative regarding your vehicle. You should also consult themanufacturer of any equipment that has been added to your vehicle.Posted facilitiesSwitch your phone off in any facility where posted notices so require.Potentially explosive atmospheresSwitch off your phone when in any area with a potentially explosiveatmosphere and obey all signs and instructions. Sparks in such areascould cause an explosion or fire resulting in bodily injury or even death.Users are advised to switch off the phone while at a refueling point(service station). Users are reminded of the need to observe restrictionson the use of radio equipment in fuel depots (fuel storage and distri-bution areas), chemical plants or where blasting operations are inprogress.Areas with a potentially explosive atmosphere are often but not alwaysclearly marked. They include below deck on boats; chemical transferor storage facilities; vehicles using liquefied petroleum gas (such aspropane or butane); areas where the air contains chemicals or particles,such as grain, dust or metal powders; and any other area where youwould normally be advised to turn off your vehicle engine.VehiclesOnly qualified personnel should service the phone, or install the phonein a vehicle. Faulty installation or service may be dangerous and mayinvalidate any warranty which may apply to the unit.Check regularly that all wireless phone equipment in your vehicle ismounted and operating properly.