49Successful completion of the steps is not a total assurance of the authenticity of the battery.If cannot confirm authenticity or if you have any reason to believe that your Nokia batterywith the hologram on the label is not an authentic Nokia battery, you should refrain fromusing it, and take it to the nearest Nokia authorized service centre or dealer for assistance.For additional information, refer to the warranty and reference leaflet included with yourNokia device.Taking care of your deviceYour device is a product of superior design and craftsmanship and should be treated withcare. The following suggestions will help you protect your warranty coverage.• Keep the device dry. Precipitation, humidity, and all types of liquids or moisture cancontain minerals that will corrode electronic circuits. If your device does get wet, removethe battery, and allow the device to dry completely before replacing it.• Do not attempt to remove the battery from the device. Nokia recommends that you takethe device to the nearest authorized service facility for replacement of the battery.• Do not use or store the device in dusty, dirty areas. Its moving parts and electroniccomponents can be damaged.• Do not store the device in high or cold temperature. High temperatures can shorten thelife of electronic devices, damage batteries, and warp or melt certain plastics. When thedevice warms to its normal temperature from a cold temperature, moisture can forminside the device and damage electronic circuit boards.• Do not attempt to open the device other than as instructed in this guide.• Do not drop, knock, or shake the device. Rough handling can break internal circuit boardsand fine mechanics.• Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the device.Only use a soft, clean, dry cloth to clean the surface of the device.• Do not paint the device. Paint can clog the moving parts and prevent proper operation.• Use only the supplied or an approved replacement antenna. Unauthorized antennas,modifications, or attachments could damage the device and may violate regulationsgoverning radio devices.• Use chargers indoors.• Backup all data you want to keep, such as contacts and calendar notes.• To reset the device from time to time for optimum performance, power off the deviceand remove the battery.These suggestions apply equally to your device, battery, charger, or any accessory.