Has anyone had success with getting Comcast to let you swap old X1 box with newer version of X1 box? The one I have is just awful. Won't rewind live TV...If I am recording nobody else can watch, sometimes it works, sometimes it doesn't...and I pay for Gig speed. I would like the XG1v4 but I don't want to have to pay out of the rear end to get it.
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