70
Troubleshooting
If you encounter problems while using the phone, or if it performs abnormally, you can refer to the chart below. If
your particular problem cannot be resolved using the information in the chart, contact the dealer where you
purchased the phone.
Problem
Possible causes
Possible solution
Poor reception
The network signal is too weak at your current
location, for example, in a basement or near
a tall building, because wireless
transmissions can not effectively reach it.
Move to a location where the
network signal can be properly
received.
The network is busy at the current time (for
example, during peak times, there may be too
much network traffic to handle additional
calls).
Avoid using the phone at such
times, or try again after waiting a
short time.
You are too far away from a base station for
your service provider.
You can request a service area map
from your service provider.
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.
Shortened standby
time
The standby time is related to your service
provider system configuration. The same
phone used with different service providers’
systems will not provide exactly the same
length of standby time.
If you are located in an area where
signaling is weak, temporarily
power off the phone.
The battery is depleted. In high-temperature
environments, battery life will be shortened.
Use a new battery.
Summary of Contents for N790
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