Zingo is an intelligent mobile phone taxi hailing service that uses the GPS technology and the phone location service of the caller’s network operator to locate the nearest available taxi in London. The passenger is then directly connected to the driver’s hands-free mobile phone.
Around 2 euros are added to the fare. This is the cut that Zingo takes to offer you the service and to install GPS receivers on taxis for free. Major wireless operators like Vodafone, T-Mobile and O2 are also on board.