I recently purchased and set up an x900E and set it up. I have a 200mbps connection and was attempting to gain UHD on the built in amazon app. The most I could get it to display was 1080. Does the built in App play in UHD or do I need to get a media player that will? Any other troubleshooting? I attempted to search the forum but couldn’t get a firm answer
Not all content is UHD on amazon, but I've been able to play UHD titles on my 900E. Takes a couple of seconds for the App to work its way up to 4k (I guess it tries to determine if you have enough bandwidth and slowly increases the resolution).