Billy called in to the radio where Jim was a DJ. This story is before the album starts, where Benny and Billy robbed a Hi-Fi shop in the middle of the night. Billy's wheelchair was used to stow some of the goods - which he later used to access a TTS line and call in to Jim's show in LA after being sent there from Wales - but otherwise... Benny's in jail. The actual reason is he committed murder - Benny and Billy were holding concrete blocks above the freeway to mess with oncoming drivers in the lanes below an overpass when Benny dropped his. So, basically, they two brothers got drunk and stupid, robbed a store, messed with traffic, and Benny got busted leaving Billy with the gear needed to start the story where he starts listening to all the radio stations. ("Tune in Moscow, tune in New York...") Okay, enough - It's better said in the liner notes but I'm a little sloshed and it happens to be one of my favourite concept albums :3
The way Billy could access all of the world's radio, and therefore had great insight was a bit like a prophecy about the internet. Unfortunately now we have that ability we're all talking and nobody's listening.