LG MX8550 Service Manual page 19

You can edit the NAM1 Name.
Press softkey "OK" (Message key) to edit more NAM1 items.
Press softkey "Back" (Contacts) to edit previous NAM1 items.
8) More NAM1 Programming
You can decide to edit more NAM1 Name.
Press softkey "OK" (Message key) to exit Service Programming.
Press softkey "More" (Contacts) to edit more advanced NAM1 items.
9) Service Code
You can edit Service Code.
Press softkey "OK" (Message key) to edit more NAM1 items.
Press softkey "Back" (Contacts) to edit previous NAM1 items.