Samsung Galaxy S3: How to Block Messages from Unknown Sender

There is a reason why sometimes you don't want to receive a message on your phone from certain contact number. Fortunately you can do this with ease in Samsung Galaxy SIII by adding the number or contacts into 'register number as spam' list. But, make sure you've enabled spam settings on your phone first to make you be able to register one or more contact number as spam.

See also: How to Block