A:AnswerI don't know about that. I have only used one ISP. I would try settings and reset to factory defaults. I am using
a Fire tv 4k into an HDMI port.
A:AnswerThe 4K is the quality of the picture. You can purchase DVD’s that are 4K allowing you to view in ultra high definition. You can view those on a DVD player that is not 4K compatible. This TV has the HDMI input for a DVD player or for games.