Sony Ericsson celebrated three years of the Walkman phone with three models. The W902, W595 and W302 handsets bring the total number of Walkman devices to 24. The range has been a huge success for the handsets maker, selling 77 million units to date.

It now embraces every conceivable form factor from candy bar to slider to flip and touchscreen. The W902 is the family’s most advanced model so far, with five megapixel camera and bundled 8GB Memory Stick Micro.