Question: how to add a song as a ringtone on iphone 8 plus?
Answer: Click "Music" to display it in iTunes, and copy the . m4r file from local to "Music". 10. Go back to the iTunes main screen, and click the iPhone device button within iTunes, go to "Tones", and you will see "Sync Tones", choose "Selected tones", click "Sync" and choose "Apply" to add ringtones to iPhone 8.