Longtime VM customer, just switched to Inner Circle with a lovely gold iPhone SE (swoon, love it!).
I've tried using the "add call" feature while on a call, to conference in a third party...but the second call doesn't ring. Do we not have this feature on VM? Thanks!
I was not able to create a conference call directly.
However, the following worked for me.
1) call the first number
2) open Contacts and select one and call it
3) when it answers, there is an option to Merge Call and that does seem to create the Conference Call function.