Samsung SPH-A680SSAQST - Manual (Page 13)

Section 1A: Setting Up Service 5
Getting Help
Directory Assistance
Directory Assistance provides access to a variety of services,
including residential, business, and government listings. There is a
per-call charge and you will be billed for airtime.
To call Directory Assistance:
ᮣ Press .
Operator Services
Operator Services can provide assistance when placing collect calls or
when placing calls billed to a local telephone calling card or third
party.
To access Operator Services:
ᮣ Press .
Note: Operator Services may not be available in all network service markets.