Hi, @Jeffro65me
Welcome!
Thank you for reaching out and inquiring about tethering your mobile device to your Roku TV.
If you want to connect your mobile device to the Roku TV for internet access via a tethering connection, we suggest using a mobile hotspot or a reliable Wi-Fi connection instead.
Hope this information helps.
Thanks,
Roku Community Team.
Takashi O.
Roku Community Moderator