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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 and areas where the 
air contains chemicals or particles such as grain, dust, or metal 
powders. You should check with the manufacturers of vehicles 
using liquefied petroleum gas (such as propane or butane) to 
determine if this device can be safely used in their vicinity.