Nokia 1650

Page 27
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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 is not working properly, take it 
to the nearest authorized service facility for service.