Biella explores the earliest hacking subculture - The Phone Phreaks - an entire subculture that learned to manipulate the phone system with plastic whistles and tone generating blue boxes, and played a part in birthing the modern digital world. She talks with Phil Lapsley, author of ‘Exploding the Phone’ and a UK hacker who was one of the last generation of traditional phone phreaks about the joy and the risks of the earliest type of hacking.