I don't want to be notified when my contacts change their telephone number, I just want it to be up to date. And my phone does that already. Also, you don't go

I don't want to be notified when my contacts change their telephone number, I just want it to be up to date. And my phone does that already. Also, you don't go into a lot of detail on what a "card" is... I assume it's like a profile on your service? Who updates this?