Special Ringtone Issue

[Palonkica]

Hy. Can somebody help me pls. I bought zte blade 3 phone yesterday, but I can't set the 'special' ringtone for some of my friends on my phonebook. All my contacts are saved on phone. I downloaded user manual, and nothing. Plsss help my. Tnx

 

[Digital Controller]

If you download a new contact app you can select a special ringtone for each person, an example of this would be this application: https://play.google.com/store/apps/details?id=com.contapps.android