Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
Re: How do I get TCM if I discontinue Directv and use Roku?
TCM only streams to people who are already paying for it through a TV provider subscription, like your DirecTV.
That provider can be any of several services that includes TCM that you can get on Roku. Services I've found that include TCM are Sling, YouTube TV, Hulu plus Live TV, and ATT Now. If you subscribe to any of these through Roku you will only be able to access it on your Roku. If you subscribe directly with the service on its website, you'll be able to view it on Roku and any other system supported by the service.
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Roku Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X | Roku Streaming Stick 3600