Roku Device Features, Settings & Updates

Help configuring Roku device settings, using Roku OS features such as screen mirroring, adjusting display type and audio settings, using Guest Mode, and assistance with software updates.
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Level 7


So I have a Samsung TV that supports 4K resolution and I have the Roku Premier.  I tried the Ultra but really had a hard time with it working properly.  My question is, I bought a better HDMI cable and tried it a s the picture is ok but not what I picture 4K to look like.  Does the premier version support 4K pictures (and if anyone has a a suggestion for a better on I will try it) and are there are any settings or tricks I’m maybe missing?  Thank you!

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