How can I set different ringtones for contacts on Samsung j7?

Android 7.1

1. From any Home screen, tap Contacts.
2. Tap the desired contact > Details.
3. Tap Edit.
4. Tap View more.
5. Tap Ringtone.
6. Tap the desired ringtone to assign it to the contact and then tap OK.
7. Tap the back arrow in the upper left corner, the selection is automatically saved.