Huawei EC156 User Guide - Page 39

9. Care and Maintenance Your radio card is a product of superior design and craftsmanship and should be treated with care. The suggestions below will help you to fulfill any warranty obligations and to enjoy this product for many years. Keep the radio card and all its parts and accessories out of small children's reach. Keep the radio card dry. Precipitation, humidity, and all types of liquids or moisture can contain minerals that will corrode electronic circuits.  Do not use or store the radio card in dusty, dirty areas.  Do not store the radio card in hot areas. High temperatures can shorten the life of electronic devices, and warp or melt certain plastics.  Do not store the radio card in cold areas. When it warms up (to its normal temperature), moisture can form inside, which may damage electronic circuit boards.  Do not attempt to open the radio card. Non-expert handling may damage it.  Do not drop, knock, or shake the radio card. Rough handling can break internal circuit boards.  Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the radio card.  Do not paint the radio card. Paint can prevent proper operation.  Use only the supplied antenna. Unauthorized antennas, modifications, or attachments could damage the radio card and may violate regulations governing radio devices. All of the above suggestions apply equally to your radio card or any accessory. If any of them is not working properly, take it to your nearest qualified service facility. The personnel there will assist you and, if necessary, arrange for service. 10. Warnings and Precautions