I have the Scion Headunit with the Ipod hookup, and the hu says satellite radio ready right on it, in order to get Sirius satellite radio, do i just have to call and get a subscription or do i have to get an antenna of somesort still installed into my car?

Like i said i have an 06 Tc with the factory radio with ipod setup.

 

both.

 

thanks, where do i get this antenna or whatever.

 

Here's a link to the kit, and there's a link to the install PDF on that page too.