Nokia have produced an RFID tag reader for their 5140 phone.
An RFID phone could appeal to consumers, too: they could check how many journeys they have left on a smart card such as the London Underground Oyster payment card, or scan a product in a shop to download information from the web. It doesn't have to be an automated system that replies: the RFID phone could send a text message asking for a follow-up call. If you want to see a film that is advertised, you could tap your phone against a poster to book a ticket.