81Other Medical DevicesOperation of any radio transmitting equipment, including cellularphones, may interfere with the functionality of inadequatelyprotected medical devices. Consult a physician or the manufac-turer of the medical device to determine if they are adequatelyshielded from external RF energy or if you have any questions.Switch off your phone in health care facilities when any regula-tions posted in these areas instruct you to do so. Hospitals orhealth care facilities may be using equipment that could besensitive to external RF energy.VehiclesRF signals may affect improperly installed or inadequatelyshielded electronic systems in motor vehicles (e.g. electronicfuel injection systems, electronic anti-skid (anti-lock) brakingsystems, electronic speed control systems, air bag systems).Check with the manufacturer or its representative regardingyour vehicle. You should also consult the manufacturer of anyequipment 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 explo-sive atmosphere and obey all signs and instructions. Sparks insuch areas could cause an explosion or fire resulting in bodilyinjury or even death.Users are advised to switch off the phone while at a refuelingpoint (service station). Users are reminded of the need to ob-serve restrictions on the use of radio equipment in fuel depots(fuel storage and distribution areas), chemical plants or whereblasting operations are in progress.Areas with a potentially explosive atmosphere are often but notalways clearly marked. They include below deck on boats;chemical transfer or storage facilities; vehicles using liquefiedpetroleum gas (such as propane or butane); areas where the aircontains chemicals or particles, such as grain, dust or metalpowders; and any other area where you would normally beadvised to turn off your vehicle engine.VehiclesOnly qualified personnel should service the phone, or install thephone in a vehicle. Faulty installation or service may be danger-ous and may invalidate any warranty which may apply to the unit.Check regularly that all wireless phone equipment in yourvehicle is mounted and operating properly.Do not store or carry flammable liquids, gases or explosivematerials in the same compartment as the phone, its parts oraccessories.