@Skulldriver2751
I'm guessing you "factory reset" your ROKU or it's new "out of the box"? If so, then you will need either the remote that came with your ROKU or get a compatible remote. Your phone won't work as a remote, if you factory reset your ROKU, the ROKU needs to be fully set up 1st. If you post exactly what ROKU, it's name and model number. Maybe someone can tell you the exact remote you need, If you do not have one, there are many available that are not expensive. best I can do with the info you provided.