Huawei U3900 User Manual page 38

extended period, low temperature burn symptoms, such as red
spots and darker pigmentation, may occur.
Do not touch the device's antenna. Otherwise, communication

quality may be reduced.
Do not allow children or pets to bite or suck the device or

accessories. Doing so may result in damage or explosion.
Observe local laws and regulations, and respect the privacy and

legal rights of others.
Child's safety
Comply with all precautions with regard to child's safety.

Letting children play with the device or its accessories may be
dangerous. The device includes detachable parts that may
present a choking hazard. Keep away from children.
The device and its accessories are not intended for use by

children. Children should only use the device with adult
supervision.
Accessories
Using an unapproved or incompatible power adapter, charger

or battery may cause fire, explosion or other hazards.
Choose only accessories approved for use with this model by

the device manufacturer. The use of any other types of
accessories may void the warranty, may violate local regulations
and laws, and may be dangerous. Please contact your retailer
for information about the availability of approved accessories in
your area.
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