To use RADIO.COM with your Sonos, open up the Sonos app. RADIO.COM is compatible with both first-generation Sonos home systems (S1 Controller app) or second-generation Sonos speakers (S2). The setup process is the same despite the difference in interface appearance.
Go to Settings in the Sonos app.
Select Services & Voice.
Select Add a Service under Music & Content.
Search for and select RADIO.COM.
Select Add to Sonos.
Select "Set up RADIO.COM".
Finally, press Done and then you will be able to stream your favorite stations and podcasts from RADIO.COM on your Sonos!