i have a k550i converted to w610i... no bugs except the active lens cover is not working you have to activate the camera manually... basically we modify are phone so that we can have the walkman2.0, flash menus, etc... maybe because we bought the wrong phone... i should have bought the w610... that is i think why we modify our phone... about the topic, YES we can have walkman on k series phones... but take note when we modify we lose some original phone features...