As far as I cold tell from the manual you can't get rid of the factory tones. But you can delete the ones you have under fun and games/sounds. The manual doesn't say much about ringtones. All it says is that some cell phone service providers can get you new tones and some can't.

Ok i just got this phone not too long ago and stupid me lost the manual... well the question i have is how on earth do i delete a ring tone i dont want? please help me with this. Thanks