RingTone in CallKit iOS 13 not work

In iOS12 and older, it was possible to copy ringtones from “/ Library / Ringtones” to this path “/var/mobile/Containers/Data/Application/.../Library/Sounds/”

The following was enough to set the ring tones for ConfrigurationProvider and then CallKit was able to ring with the desired ringtone.


This does not work on iOS 13.

Is it an iOS13 error/bug or is this option disabled completely?


If this is disabled, is there an option to use Apple’s ringtone for our application, please??