For public transportation in Bucharest, ticket payment can be made on buses, trolleybus, tram or metro using mobile phones or credit cards.
You find here all you need to know about the public transport in Bucharest.
You can plan your local transportation with the "Info TB" application: Google Play or Apple Store.
Underground: https://www.metrorex.ro/
Taxis in Bucharest: we recommend Uber and Bolt.