HTC EVO View 4G User Manual page 210

Most modern electronic equipment is shielded from RF
energy. However, certain electronic equipment may not
be shielded against the RF signals from your wireless
device; therefore, use of your device must be restricted
in certain situations.
In addition, the computer portion of your device
produces low levels of RF energy due to the generation
of digital timing pulses by its clock oscillator circuits.
Your device has been equipped with internal shielding
to minimize stray emissions of RF energy. However, use
of the computer functions of your device must be
restricted in certain situations.
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.
202 4A: Important Safety Information
Turn Off Your Device Before Flying
Aircraft
FCC regulations prohibit using the transmitting function
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
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