Just called, the special number routed me around the phone menus, but I got routed to a standard CSR queue in the end. They didn't answer my call with the expectation that I would ask about a HD upgrade, that was obvious. But I did get someone in the USA, at 11:50 CDT, which was a surprise. So perhaps it was routed to a call center that has a responsibility to know more about the HD promos.