Not usually in the phones settings @1wexford
But your network usually has a shortcode set up to be able to extend the amount of rings it takes before the service switches to voicemail.
I'd suggest to check the help and support pages of your network and or call your networks customer services.
Daily Driver > Samsung Galaxy s²⁴ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
