just installed xfinity x1 and cannot get my 350 to work. I tried to reconfigure it by the samsung cable box was unlisted
Did you ever get your problem resolved? I have the same issue and have not found the solution.
I see that you have not been able to configure your set top box. You can try on the search option instead of the list and type in x-1. I have reconfigured several using that option and they have worked.
Sling Media Support Team
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