Said they were "Texas Shaves". Claimed to be part of a federal program to lower homeowners' energy costs. Claimed not to know what the Do Not Call List is. Persisted in trying his spiel although I informed him that we were not a customer & therefore by law he was NOT to call us. Said, "well, you're not our customer yet..." at that point I hung up on him. Shall now register complaint at Do Not Call site.