Zte Cricket Sonata 4G, User Manual

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Problem Possible causes Possible solution
Battery not
charging
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 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 .
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 .
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
.
Cannot turn
your phone on
Battery power has been depleted . Recharge the phone’s battery .
SIM card error The SIM card has malfunctioned or is
damaged .
Take the SIM card to your
service provider for testing .
SIM card inserted improperly . Insert the SIM card properly .
Debris on the SIM card contacts . Use a soft, dry cloth to clean the
SIM card contacts .
TROUBLESHOOTING
Problem Possible causes Possible solution
Unable to
connect to the
network
The SIM card is invalid . Contact your service provider .
You are not within the network’s
service area .
Check the service area with
your service provider .
Poor signal . Move to an open space, or if
you are inside a building, move
closer to a window .
Cannot answer
incoming calls
You have activated the Call Barring
feature .
Go to Call Barring Settings , and
then select Deactivate All .
Cannot make
outgoing calls
You have activated the Call Barring
feature .
Go to Call Barring Settings , and
then select Deactivate All .
You have activated Fixed Dialing
Numbers .
Go to Fixed Dialing Numbers
and disable it .
PIN code
blocked
You have entered an incorrect PIN
code three consecutive times .
Contact your service provider .
If the service provider provides
the SIM card’s PUK code, use
the PUK code to unlock the SIM
card .
Unable to enter
information into
the phonebook
The phonebook’s memory is already
full .
Delete unnecessary data from
the contacts .
Phone crashes,
reboots, freezes,
or cannot be
powered on
Some third-party software is not
compatible with your phone .
Uninstall the software that may
cause the problem .
Upgrade the phone software .
Reset the phone to factory
status .
Device is
sluggish or
responds slowly
Your phone is allocating memory to a
large number of apps running at the
same time .
Go to
Task Manager
and close
apps that are not being used .
TROUBLESHOOTING