Samsung Galaxy S3: How to Adjust Sound Volume

Set the ringtone is the best way to tell you who the person is calling you. Moreover, in Samsung Galaxy SIII you can also assign different ringtone on each contact you have saved on your phonebook.

See also: How to Set Different Ringtone for Different Contact on Samsung Galaxy S3

Once you've assign ringtone, then whenever the contact calls you then the phone will ring the tone you already set