I don't have a desktop or laptop, only mobile devices.
Can this router be configured without a computer? I am on a Comcast cable Router.
Yes you can. You can either download the Linksys Smart Wifi app to setup locally over the router's wifi network. Or you can use a compatible mobile web browser to use the Linksyssmartwifi.com cloud based setup. As for Comcast service, I am not familiar with them but it should not make a difference. Note that to use the linksyssmartwifi.com process the router needs to get an IP address from your (Comcast}. I assume you are looking to replace the Comcast router with this so that should not be a problem.