Phone, for sure. These days - if they are too under-staffed to answer the phone, I don't want to order and then wait. And wait. And wait...

And usually from a little regional pizza chain - which has ~30 "Gourmet" options (popular combinations of sauce and 3-5 items, at a slight discount) to speed up deciding & ordering. Plus a Caller ID/Order History system, so I can tell a new employee "my usual".