When you book a visit to the theatre or cinema by phone, you could be admitted at the door simply by waving your cellphone past a computer at the ticket office, says Qualcomm of San Diego, California (WO 2004/3694).
You book a ticket to an event via a cellphone call, and the venue sends you a confirmation code in the form of a short audio message, which is saved on your phone as a voicemail. The message contains encrypted details of the event, and when you get to the venue, you play back the voicemail into a microphone at…
