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Problem Possible causes Possible solution
Echo or
noise
Poor network trunk quality
on the part of your service
provider.
End the call and dial
again. You may be
switched to a better-
quality network trunk
or phone line.
Poor local telephone line
quality.
End the call and dial
again. You may be
switched to a better-
quality network trunk
or phone line.
Unable
to select
certain
features
Your service provider does
not support these features,
or you have not applied for
services that provide these
features.
Contact your service
provider.
Battery not
charge
The battery or battery
charger is damaged.
Contact the dealer.
The phone’s temperature
is below 0°C or higher than
45 °C.
Adjust the
battery charging
environment to
avoid extremes of
temperature.