Yes it's possible. I just received mine. To get 4k content to play I had to set up the DVR then do a system refresh and restart. Before that, only about 4 seconds would play then it would just stop. Since then all seems well. Now if only the Netflix app would play in 4k. I've verified that the program is available via the TV app, just not on the Xfinity app. Pain in the butt. Oh yeah, be prepared to pay $15 shipping for the DVR to be sent to you. I'm going to ask for a refund of the fee since I've made multiple calls and visits to attempt to swap it locally. I won't hold my breath but it's worth a shot.
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