Huawei U3900 User Manual page 6

Do not attempt to disassemble your phone or its
accessories. Only qualified personnel are allowed to
service or repair the phone.
Do not place your phone or its accessories in
containers with a strong electromagnetic field.
Do not place magnetic storage media near your
phone. Radio waves from the phone may erase the
information stored on them.
Do not expose your phone to extreme temperatures
or use it at a location with flammable materials,
such as a gas station.
Keep your phone and its accessories away from
children. Do not allow young children to use your
phone without adult supervision.
Use only approved batteries and chargers to avoid
the risk of explosions.
Observe any laws or regulations on the use of
wireless devices. Respect the privacy and legal rights
of others when using your phone.
To prevent damage to your phone or your
computer, follow all instructions pertaining to the
USB cable.
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