How to delete ringtones on your iPhone from the phone itself?

I've tried hooking up my phone to my computer to delete it that way but my computer won't connect to my phone for some reason. I just want to know if there's a way to delete ringtones that are on my phone FROM MY PHONE WITHOUT CONNECTING IT TO THE COMPUTER. If you're going to tell me to connect my phone to the computer, please read what I wrote in the first sentence.

You won't be able to delete ringtones that are already on the phone because they are embedded into the phone's system software. The only ringtones you can delete are ones you have downloaded to your phone or SD card.

You can't unless your device in jailbroken