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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.
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.