How do I set a custom ringtone for phone calls only on a Galaxy S6 for a contact??

[AC Question]

I set a custom ringtone to a friend's contact info, but I only want it for when that person calls. Currently it goes off if I get a call, or a text. Every time the person texts me the whole ringtone goes off, and it never used to do this on the Galaxy S2 I had a while ago. How do I set it for just the calls??