We were having DNS issues with our ISP and I was checking what devices were operating and which weren't. I fired up Netflix like I normally do on my H3 and didn't see the TV flicker, but low and behold, not only did Netflix come up on a new secure DNS, but in 4K UHD. Didn't check for HDR(10). I even switch programs a couple of times and it stayed in 4K. Now that I have posted this, I've jinxed it and it'll stop . . . Just tried Youtube and the TV flickered like it does when the box checks, but no 4K.