158
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.
Poor contact between
the battery and charger.
Check all connectors to
make sure all
connections have been
properly made.
Summary of Contents for V790
Page 1: ...1 V790 User Manual ...
Page 12: ...12 Getting Started Your Phone at a Glance ...
Page 44: ...44 list ...
Page 85: ...85 3 Make the changes you want and touch the Back Key when you re finished ...
Page 155: ...155 About Phone View phone status and legal information You can also check for system updates ...
