Samsung SGH-I907ZKAATT - Manual (Page 167)

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• Do not store the phone in cold areas. When the phone warms up to its
normal operating temperature, moisture can form inside the phone,
which may damage the phone's electronic circuit boards.
• Do not drop, knock or shake the phone. Rough handling can break
internal circuit boards.
• Do not use harsh chemicals, cleaning solvents or strong detergents to
clean the phone. Wipe it with a soft cloth slightly dampened in a mild
soap-and-water solution.
• 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,
take it to your nearest qualified service facility. The personnel there
will assist you, and if necessary, arrange for service.