Samsung SGH-X427 - Manual (Page 139)

Health and Safety Information
134
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.
Emergency Calls
This phone, like any wireless phone, operates using radio
signals, wireless and landline networks as well as user-
programmed functions, which cannot guarantee connection
in all conditions. Therefore, you should never rely solely on
any wireless phone for essential communications (medical
emergencies, for example).