I have my landline diverting to my iPhone. However, it does not distinguish whether the call has come from my diverted landline number. My old Nokia many years ago used to show an arrow symbol when it was a call thats source was diverted. I really need to know when a call has come from my landline so I can greet the caller in the appropriate way and also so I can be sufficiently short as I am getting charged for the call from my BT landline to my mobile.

Can it be done on the iPhone? Im O2 and BT for the landline.