GO4 Pegasus 553, User Manual, Page: 89 / 90

88
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.
Failed to
charge the
battery
The battery or the
charger is
damaged.
Change a new
battery or
charger.
Charge the battery
when
ambient
temperature is
lower than -10 ℃
or above 55
℃
.
Change the
environment.
Poor connection. Check whether
the plug is
properly
connected.
Failed to add
contacts to
The storage space
of phonebook is
Delete some
contacts from the