Hi @RyRY,
Thanks for posting here in the Roku community!
We understand you're interested in using the Roku mobile app to control your Roku device. To help you out, we'll need some additional information about your current setup. Can you please let us know if your Roku device is currently connected to a wireless network? If it isn't, we're sorry to say that it won't be possible to connect your phone to your TV without Wi-Fi. To establish a connection, you'll need to use the Roku remote to connect your TV to Wi-Fi first. Once that's done, you can then connect your phone to the same network to complete the process. If you need a replacement remote for your Roku device, you can purchase one from the Roku website or from a third-party retailer. We hope this information is helpful!
For future reference, here's: How to connect the Roku mobile app to your Roku device over Wi-Fi
Please keep us posted on how it goes.
Thanks,
Anjelie
Anjelie A.
Roku Community Moderator