Samsung GALAXY S3 Owner's Manual page 80

Potentially Explosive Environments
Switch your mobile device 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 mobile device 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.
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