LG E400b Quick Start Manual page 22

Troubleshooting
Message Possible causes
To change a security
code, you will need to
confirm the new code by
Codes do
re-entering it.
not match
The two codes you have
entered do not match.
Any
Not supported by service
application
provider or registration
cannot be
required.
set
18
Possible corrective measures
If you forget the code, contact your service provider.
Contact your service provider.