call ringtone for 5c

my brother bought iphone 5c and we got a problem I can't change call ringtone how can I do that? thank you for help

 

To change the default ringtone for all incoming calls tap on Settings-Sounds-Ringtone then choose the ringtone you like. You can also set custom ringtones for your contacts as well. Just tap Contacts, then tap on the contact you want to assign a ringtone to, then tap Edit. Then just scroll down until you see Ringtone, once you tap that it will then allow you to choose the custom ringtone for that contact.

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thank you I'll try I hope I'll get it