First, download the application into your device. You would need to restart your device if you are getting an error message "app not working". Now, connect to your Linksys Wi-Fi network. Enter USERNAME & PASSWORD, Tap SIGN IN then go to the Menu button, at the top left corner, after that choose NEW SETUP Next. Just follow the onscreen instructions to set up your extender. For Linksys ... https://linksyswifiextender.net/linksys-velop-setup/