I am in the process of installing a Dish receiver in our motor home. I am using the manual point antenna that came with the RV. The Dish person told me which receiver to purchase (I did) and advised that I could go through the set up procedure then check channel 101 to verify functionality. The process goes well until I get to step 4 (receiver activation). Screen says since I don't have a phone line connected, I need to call the 800 number to have the receiver activated. When I did so, this person says they wont activate the receiver unless I sign up for service. Is that fact or do I need to call Tech Service?