Click4Taxi is an application allowing you to request a taxi from your mobile telephone in a quick, easy and free way. Where can I use Click4Taxi? At the present moment the service is working in Lisbon (Portugal), Oviedo (Asturias - Spain), Siero (Asturias - Spain) and Lima (Lima - Peru), very soon we will be moving the service to new cities. Click4Taxi user guide.