Question: how to add ringtones back on iphone?
Answer: 1) Open the Settings app on your device.
2) Touch Sounds or Sounds & Haptics in the list.
3) Now tap on any sound in the list.
4) If you've purchased ringtones from iTunes in the past and they're still available on the store, you should see the option labeled Download All Purchased Tones at the top of the page.