Nokia C5-03 - How do I change the ringing tone on my Nokia device?

Select Menu > Settings >Personal > Profiles.

You can use profiles to set and customise the ringing tones, message alert tones, and other tones for different events, environments, or caller groups.

To change Ringing tone on your touch screen device, choose profile and select Options > Personalise (or double-tap the profile and select Personalise).