How to delete ringtone on iPhone 4?

How do you remove a ringtone you purchased and downloaded on a iPhone 4s

Have you tried settings

Thru iTunes - you delete it there, if you want it permanently gone. If you just do not want to USE it - then in Settings on your phone, choose something else! We have edited clips of music we own, and used those as ringtones - load them into iTunes, then onto the iPhone - done! Since we're professional classical musicians, we have clips of US playing as ringtones!