120RF signals may affect improperly installed or inadequatelyshielded electronic operating systems and/or entertainmentsystems in motor vehicles. Check with the manufacturer ortheir representative to determine if these systems areadequately shielded from external RF signals. Also checkwith the manufacturer regarding any equipment that hasbeen added to your vehicle.Consult the manufacturer of any personal medical devices,such as pacemakers and hearing aids, to determine if theyare adequately shielded from external RF signals.Turning Off Your Phone Before FlyingTurn off your phone before boarding any aircraft. To preventpossible interference with aircraft systems, the U.S. FederalAviation Administration (FAA) regulations require you to havepermission from a crew member to use your phone while theplane is on the ground. To prevent any risk of interference,FCC regulations prohibit using your phone while the plane isin the air.Turning Off Your Phone in Dangerous AreasTo avoid interfering with blasting operations, turn off yourphone when in a blasting area or in other areas with signsindicating that two-way radios should be turned off.Construction crews often use remote-control RF devices toset off explosives.Never transport or store flammable gas, liquid or explosivesin the compartment of your vehicle that contains your phoneor accessories.