Samsung SGHA877 User Manual page 190

Do not paint the phone. Paint can clog the device's moving parts and
•
prevent proper operation.
Do not put the phone in or on heating devices, such as a microwave
•
oven, a stove or a radiator. The phone may explode when overheated.
If your phone is equipped with an external antenna, use only the
•
supplied or an approved replacement antenna. Unauthorized antennas
or modified accessories may damage the phone and violate
regulations governing radio devices.
If the phone, battery, charger or any accessory is not working properly,
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take it to your nearest qualified service facility. The personnel there
will assist you, and if necessary, arrange for service.
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