The Sony Ericsson W580i is a slider and part of Sony Ericsson's old Walkman phone range. Perhaps most importantly for a Walkman phone the Sony Ericsson W580i features a 3.5mm audio jack, allowing you to use your own headphones. The 12MB of on board memory can be expanded to up to 2GB with an M2 memory card. Bluetooth with A2DP support is also included if you want to use a wireless headset when you're out jogging. The W580i supports all of the popular music file formats and comes with TrackID, which allows you to identify tracks by holding the phone up to a speaker. If it's pictures you're after there's a 2-megapixel camera but no flash or autofocus, so don't expect great things.