mobile

Hia all
I need your support please
When I call anyone … if he have a call in progress I must receive that call is waiting.. I didn't receive it on lollipop on stock or ony other rom
Also when I make a divert and try to call any one I muat receve toast message told me that conditional or unconditional call forword is active
Also I don't receve this
It's my problem.
Any one help me please
Thanks