2 Answers

To restrict incoming or outgoing calls, messages or location setting follow the steps below:

From the standby screen, press OK for Menu
Select Settings & Tools (9)
Select Phone Settings (8)
Select Security (6)
Enter the Lock Code (Last 4 digits of number) then press OK
Select Restrictions (2)
Enter the Lock Code (Last 4 digits of number) then press OK
Select one of the following Restrictions:
Location Setting (1)
Highlight either Unlock Setting or Lock Setting, using the navigation keys
Press OK to save the Location Restriction setting
Calls (2)
Select either Incoming Calls (1) or Outgoing Calls (2)
Highlight one of the following Call Restriction settings:
Allow All
Contacts Only
Block All
Press OK to save the Call Restriction setting
Messages (3)
Select either Incoming Messages (1) or Outgoing Messages (2)
Highlight either Allow All or Block All, using the navigation keys
Press OK to save the Message Restriction setting 

http://www.samsung.com/us/support/SupportOwnersFAQPopup.do?faq_id=FAQ00039357&fm_seq=39525

I simply call my carrier (611) and get technical help from them.