Troubleshooting - Zte Sonata 4G User Manual

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
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
cannot effectively reach it .
The network is busy at the current
time (for example, during peak times,
there may be too much network
traffic to handle additional calls) .
You are too far away from a base
station for your service provider .
Echo or noise Poor network link quality on the part
of your service provider .
Poor local telephone line quality .
Unable to Your service provider does not
select certain support these features, or you have
features not applied for services that provide
these features .
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Possible solution
Move to a location where the
network signal can be properly
received .
Avoid using the phone at such
times, or try again after waiting
a short time .
You can request a service area
map from your service provider .
End the call and dial again . You
may be switched to a better-
quality network link or phone
line .
End the call and dial again . You
may be switched to a better-
quality network link or phone
line .
Contact your service provider .
TROUBLESHOOTING
Problem Possible causes
Battery not The battery or battery charger is
charging damaged .
The phone's temperature is below 0°C
or higher than 45°C .
Poor contact between the battery
and charger .
Shortened The standby time is related to your
standby time service provider system configuration .
The same phone used with different
service providers' systems will not
provide exactly the same length of
standby time .
The battery is depleted . In high
temperature environments, battery life
will be shortened .
Battery power is consumed in a
variety of ways, including sending
out signals to locate a base station
when you are unable to connect to
a network .
Cannot turn Battery power has been depleted .
your phone on
SIM card error The SIM card has malfunctioned or is
damaged .
SIM card inserted improperly .
Debris on the SIM card contacts .
TROUBLESHOOTING
Possible solution
Contact the dealer .
Adjust the environment to avoid
extremes of temperature .
Check all connectors to make
sure all connections have been
properly made .
If you are located in an area
where signaling is weak,
temporarily power off the phone .
Use a new battery .
Turn off Wi-Fi, GPS, and Bluetooth
if they are not being used . You
can also adjust your screen
brightness and timeout duration
in Settings > Display .
Recharge the phone's battery .
Take the SIM card to your
service provider for testing .
Insert the SIM card properly .
Use a soft, dry cloth to clean the
SIM card contacts .
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