u40 – User’s Guide
50
Replace the batteries
Change with a new
battery.
When no signals are
received, your phone
will continue searching
for base stations, thus
consuming a large
amount of battery
power and reducing
standby time.
Use your phone at
strong signal areas
or Turn off the
phone temporarily.
Failed to turn
on your
phone
The battery power is
used up.
Check the battery
power level or
charge the battery.
SIM card
error
The SIM card is
damaged.
Contact your
network service
provider.
The SIM card is not
properly installed.
Ensure the SIM card
is properly installed.
The metallic face of the
SIM card is
contaminated.
Wipe the face with
a clean cloth.
Failed to
connect to
the network
The SIM card is invalid.
Contact your
network service
provider.
Beyond the GSM
coverage.
Consult the network
service provider for
service areas.
The signal is feeble.
Retry at a stronger
signal area.
Failed to
make a call
The call barring feature
is used.
Cancel the call
barring settings.
The fixed dialing
number feature is
used.
Cancel the fixed
dialing number
settings.
PIN code
error
Enter incorrect PIN
codes for three times
in succession.
Contact your
network service
provider.