LG E400 User Manual page 674

Troubleshooting
Message Possible causes
To change a security code,
you will need to confirm the
Codes do not
new code by re-entering it.
match
The two codes you have
entered do not match.
Any Not supported by service
application provider or registration
cannot be set required.
Dialling error
New SIM card inserted.
Calls not
available
Pre-paid charge limit
reached.
118
Possible corrective measures
If you forget the code, contact your service provider.
Contact your service provider.
New network not authorised.
Check for new restrictions.
Contact service provider or reset limit with PIN2.