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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 accessories. 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