In 1973, Marty Cooper made the first public mobile phone call using his newly invented cell phone. Now, there are more mobile phones on the planet than people. Fourteen-year-old Becky, from Northern Ireland, asks Marty about that call and how his invention changed our lives.

Producer: Tamsin Barber.

World Wise Web is a co-production between BBC World Service and BBC Rewind.
Music composed by Nick Thorburn