This article will explain how to manage your blocked caller list on your Samsung mobile phone. Any numbers that appear on your reject list will be blocked from calling or contacting you via your mobile phone.
Manage Your Caller Reject List
Head to Settings > Applications > Call. Next, click on All Calls > Auto Reject > Reject list.
Here, you will be able to add or delete numbers on this list. You can remove a number from the reject list by simply unchecking the number(s) of your choice.