User's Manual

-31-
The SIM card
is invalid
Contact your network service provider
The mobile
phone is not
in a service
area of the
GSM network
Move to the network operator's service area
The mobile
phone cannot
connect the
network
The signal is
weak
Move to a place where the signal quality is high
The charging
voltage does
not match the
voltage range
indicated on
the charger
Ensure the charging voltage matches the voltage range
indicated on the charger
The battery
cannot be
charged
An improper
charger is
used
Use the charger specially designed for the mobile phone