Turn Off Your Device In Dangerous Areas; Turn Off Your Device Before Flying - HTC EVO Shift 4G Basic Manual

Electronic Devices in 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
Turn your device OFF where posted notices so require.

Turn Off Your Device Before Flying

Aircraft
FCC regulations prohibit using the transmitting and
phone functions of your device while in the air. In
addition, most airline regulations prohibit the on-board
use of portable PCs (and all other portable electronic
devices that could potentially emit stray RF energy),
particularly during take-offs and landings, to prevent
any possible interference with the reception of signals
by airborne electronic navigational devices.
Turn your device OFF before boarding an aircraft.
Always request and obtain prior consent and approval
132 3A. Important Safety Information
of an authorized airline representative before using
your device aboard an aircraft. Always follow the
instructions of the airline representative whenever using
your device aboard an aircraft, to prevent any possible
interference with airborne electronic equipment.

Turn Off Your Device in Dangerous Areas

Blasting Areas
To avoid interfering with blasting operations, turn your
device OFF when in a "blasting area" or in areas
posted "Turn off two-way radio." Obey all signs and
instructions.
Potentially Explosive Atmospheres
Turn your 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.
Areas with a potentially explosive atmosphere 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; vehicles using
liquefied petroleum gas (such as propane or butane);