I sold my router to someone the other day for use on twc after changing isp's. It is a motorola sbg6580. TWC uses these modems all the time and sells them themselves so i figured it would work. Well i got a call from the guy i sold it to saying they cant access the mac adress on it. I know it has 2 of them and I dont know if its their tech guys having problems which is what i thought it was but he wont leave me alone and i used hte modem a week before selling it and straight back to the box so i doubt its the modem itself. He told me though that I needed to have the mac adress unlocked or something from my old isp? This was a personal modem from best buy so i wouldnt think they could do that but is it possible? Or any idea how to get around or fix this myself?