Samsung SCH-R631DWACRI - Manual (Page 113)

Health and Safety Information 109
Vehicles
RF signals may affect improperly installed or inadequately shielded
electronic systems in motor vehicles. Check with the manufacturer or
its representative regarding your vehicle. You should also consult the
manufacturer of any equipment that has been added to your vehicle.
Posted Facilities
Switch your phone off in any facility where posted notices require you
to do so.
Potentially Explosive Environments
Switch your phone off when in any area with a potentially explosive
atmosphere and obey all signs and instructions. Sparks in such areas
could cause an explosion or fire resulting in bodily injury or even
death.
Users are advised to switch the phone off while at a refueling point
(service station). Users are reminded of the need to observe
restrictions on the use of radio equipment in fuel depots (fuel 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), areas where the air contains chemicals
or particles, such as grain, dust or metal powders, and any other area
where you would normally be advised to turn off your vehicle engine.