Roku is on n I dont have a remote for it. I downloaded the app ok n my phone. Got the remote roku app. N it doesn't detect my device
You need a remote, period!
You need a remote for a new device setup. There is way to do it without a remote but it requires a lot of technical hoop-jumping.
https://www.google.com/amp/s/www.businessinsider.com/how-to-connect-roku-to-wifi-without-remote%3Fam...