They claim to be Comcast and are offering upgrades to my service. A client of mine actually accepted the upgrade and they claim she got a deal of a life time even gave her and installation day. But I found it fishy so I called Comcast directly and they said she had no installation day set. And there was no such deal available. So be aware. And don't except any deal. Worrys me this may be away to get into your home. They call almost every day. And leave no message