Tv shows HDMI AT&T instead of Comcast or Xfinity

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Vito218

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Hello. When I go to source on my Samsung TV, it shows TV is on hdmi AT&T. Why doesn't it show Comcast or Xfinity? Used to have Uverse. Sorry if this is a dumb question.

"Tv shows HDMI AT&T instead of Comcast or Xfinity," is about XFinity-Comcast Television.

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