LG GT540g User Manual page 90

Troubleshooting
This chapter lists some problems you might encounter
while using your phone. Some problems require you to
call your service provider, but most are easy to correct
yourself.
Possible
Message
causes
There is no
SIM card in
SIM error the phone or
it is inserted
incorrectly.
Signal weak.
No network
Outside GSM
connection
network area.
To change a
security code,
you must
Codes do
confirm the
not match
new code by
entering it
again.
Not supported
Function by service
cannot be provider, or
set registration
required.
88
Possible solutions
Make sure the SIM card is correctly
inserted.
Move closer to a window or into
an open area. Check the service
provider coverage map.
Contact your service provider.
Contact your service provider.