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25MPS download speed should be good enough for 4K, so if your WIFI can download at this rate or better, you should have the capability without an ethernet cord. I think some streaming services require upgraded service to allow you to watch 4k. You might try a 4K you tube video and see if that plays at 4k - here is a random example: https://www.youtube.com/watch?v=_-WWwNt8AzU This should play at 4K on your TV. If it does not, you may wish to contact service.
Sorry, there was a problem. Please try again later.I'm sorry that I can't answer since I haven't once watched the TV. Geek Squad hooked it up and they always are my go to people, I have Spectrum internet and an antenna whatever Geek Squad decided was what I agreed to! I know nothing about technology and leave it up to the pros!
Sorry, there was a problem. Please try again later.Not sure I have xfinity cable and that works fine.
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