Samsung Galaxy S4 Mini emojis not working, how can I fix this problem?

[AC Question]

Samsung Galaxy S4 Mini emojis not working

I have a Samsung Galaxy S4 Mini, when I send people text messages using emojis only I can see them. The emojis appear as question marks for the person that I send them too. My emojis ONLY do that when I text people, if I use my emojis on twitter of Facebook they work. Is there anything I can do to fix this problem?