Early last year we saw a a prototype from Sony Ericsson that was running Windows Phone 7. The company never did announce a WP7 device, but now more shots have cropped up of what appears to be the same device. It's a prototype of the same model, but this one has a white back and keyboard. The prototype has a slide-out QWERTY keyboard and recognizable Sony Ericsson styling (the back looks a lot like the back of a Neo, for one).
GSM Arena, New photos of old Sony Ericsson WP7 phone prototype surface
