Correct me if I'm wrong, but you want to change your call ringtone? If that so here's the step to change your call ringtone:

1. In home screen, press Menu
2. Scroll to Settings and press Open
3. With Profiles highlighted, press Select
4. Scroll to your desired profile and press Edit
5. With Ringtone highlighted, press Select
6. Scroll to Ringtones and press Open
7. Scroll to the desired ringtone and press Select
8. Press Back to return to the Profiles menu
9. Scroll to the desired Profile and press Activate

Hope it helps! :)

Reference: Link