How to Set Custom iPhone Ringtones
The iPhone allows you to set custom ringtones for contacts in your phone book. Assign specific ringtones to any contact entry you want. This way, you will recognize callers by their distinctive ringtones. Customizing your contacts' ringtones will also help you distinguish your iPhone's ring in public. You can add, edit and remove assigned ringtones any time by editing the contact's ring options.
Open "Contacts" from your Home screen.
Scroll through the list and tap a contact's name to select it. The contact's Info page will open.
Tap the "Edit" button on the menu bar at the top of the screen.
Tap the "Ringtone" field. The Ringtones page will load.
Tap on any ringtone listed to select it.
Tap the "Save" button on the menu bar. This will take you back to the contact's Info page.
Tap "Done" to exit.