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As long as your AT&T box is using HDMI for output, yes, it will work.
Sorry, there was a problem. Please try again later.If the box sends an hdmi signal to the tv the synch box can and should be out between it and the tv and. Should work
Sorry, there was a problem. Please try again later.If it has hdmi it will work.
Sorry, there was a problem. Please try again later.
