Is it a media player or a phone? With the Sony Ericsson Walkman, it really depends on how you look at it and what your definition is. Man, looking back at the Walkman I used have as a kid, makes me wonder where all of the time went.

The company will unveil further details of its Walkman mobile in March.

It made the announcement at the 3GSM World Congress mobile phone trade fair held in the French town of Cannes.

Music by Sony BMG artist Natasha Bedingfield was played over a phone connected to loudspeakers at the event.

Sony Ericsson also launched three third-generation (3G) mobile phones in Cannes, including the Z800, a multimedia phone with a 1.3 megapixel camera, and the K600, a successor to the non-3G T610.

The K600 is aimed at the business market and can use the same mobile accessories as the T610, Chief Executive Miles Flint said.

Sony Ericsson has brought out a card that slots into a PC that can operate on Edge, a high-speed data technology, used on some of today’s GSM networks and on four GSM frequencies.