Nokia 1661 User Manual page 28

moisture can form inside 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 boards and
fine mechanics.
● Do not use harsh chemicals, cleaning solvents, or
strong detergents to clean 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 regulations governing
radio devices.
● Use chargers indoors.
● Always create a backup of 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 device and
remove the battery.
These suggestions apply equally to your device,
battery, charger, or any enhancement. If any device
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