Sony Ericsson upgraded its mobile phone line with thinner, more fashionable Walkmans. The company has achieved sales of 20 million Walkman phones and 60 million of general music-enabled products.

The W880 is just 9.4mm in width, about the thickness of a CD case, which is similar to the Motorola RAZR. The W880 will come with a 1GB removable memory stick and a 2.0 megapixel camera.

The W610 has a 512MB removable stick and similar 2.0 megapixel camera. It features MusicID, which identifies songs on the built-in FM radio and displays information on relevant artist and track.