Samsung SCHU520 User Manual page 184

Do not put the phone in or on heating devices, such as a microwave oven, a stove
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or a radiator. The phone may explode when overheated.
If your phone is equipped with an external antenna, use only the supplied or an
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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
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your nearest qualified service facility. The personnel there will assist you, and if
necessary, arrange for service.
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