Recent Samsung 4K HDTV. I have HD quality when watching Netflix/Hulu via apps or gaming via HDMI. I CAN see that same clear HD quality when in the FIOS menu and the live tv screen is shrunken to the top right-hand side of the screen. I have played around in video settings a LOT.
Video Format is 1080i 16:9
TV Type is 16:9
Graphics Setting is HD
Video Sharpness is 5-Sharper (also adjusted Samsung settings to 100 sharpness)
Coax cables connected to ONT are secure
Live TV is slightly pixelated and not the perfectly clear image I expect.
If you search the forums, some have reported that Quantum with a 4K TV does not always give great picture quality.
You may be in luck as there are new 4K Quantum STBs rolling out.
If a forum member gives an answer you like, give them the Kudos they deserve. If a member gives you the answer to your question, mark the answer as Accepted Solution so others can see the solution to the problem.