Health and Safety Information140Other Medical DevicesIf you use any other personal medical devices,consult the manufacturer of your device todetermine if it is adequately shielded from externalRF energy. Your physician may be able to assist youin obtaining this information. Switch off your phonein health care facilities when any regulations postedin these areas instruct you to do so. Hospitals orhealth care facilities may be using equipment thatcould be sensitive to external RF energy.VehiclesRF signals may affect improperly installed orinadequately shielded electronic systems in motorvehicles. Check with the manufacturer or itsrepresentative regarding your vehicle.You should also consult the manufacturer of anyequipment that has been added to your vehicle.Posted FacilitiesSwitch off your phone in any facility where postednotices require you to do so.Health and Safety Information141Potentially Explosive AtmospheresSwitch off your phone when in any area with apotentially explosive atmosphere and obey all signsand instructions. Sparks in such areas could causean explosion or fire resulting in bodily injury or evendeath.Users are advised to switch off the phone while at arefuelling point (service station). Users arereminded of the need to observe restrictions on theuse of radio equipment in fuel depots (fuel storageand distribution areas), chemical plants or whereblasting operations are in progress.Areas with a potentially explosive atmosphere areoften but not always clearly marked. They includebelow deck on boats, chemical transfer or storagefacilities, vehicles using liquefied petroleum gas(such as propane or butane), areas where the aircontains chemicals or particles, such as grain, dustor metal powders, and any other area where youwould normally be advised to turn off your vehicleengine.