> But for some reason Chromecast only detected the Roku TV in my roommate's bedroom, not the Roku Ultra. I used to have this problem because my 2.4Ghz and 5Ghz

> But for some reason Chromecast only detected the Roku TV in my roommate's bedroom, not the Roku Ultra. I used to have this problem because my 2.4Ghz and 5Ghz SSIDs had separate LANs. So if Chromecast was connected to 2.4Ghz (as they like to do) and your phone was connected to 5Ghz, your phone won't be able to see the Chromecast. The remedy is to either bridge the networks or connect to the appropriate band.