Sanyo Katana User Manual page 241

Turning Off Your Phone in Dangerous Areas
To avoid interfering with blasting operations, turn your phone off when in a
blasting area or in other areas with signs indicating two-way radios should
be turned off. Construction crews often use remote-control RF devices to
set off explosives.
Turn your phone off when you're in any area that has a potentially explosive
atmosphere. Although it's rare, your phone and accessories could generate
sparks. Sparks can cause an explosion or fire, resulting in bodily injury or even
death. These areas are often, but not always, clearly marked. They include:
Fueling areas such as gas stations.
Below deck on boats.
Fuel or chemical transfer or storage facilities.
Areas where the air contains chemicals or particles such as grain, dust,
or metal powders.
Any other area where you would normally be advised to turn off your
vehicle's engine.
Note:
Never transport or store flammable gas, flammable liquids, or explosives in the
compartment of your vehicle that contains your phone or accessories.
Restricting Children's Access to Your Phone
Your phone is not a toy. Do not allow children to play with it as they could
hurt themselves and others, damage the phone or make calls that increase
your Sprint PCS Invoice.
Section 4A: Important Safety Information 225