Although there are official product placements on TV, there are sometimes non-official ones. The former are clear mini-commercials where the latter are just things we notice but you can't tell what it is.
Unless you're an eagle-eyed Windows Phone owner like @Hendo427, who let us know he spotted the Focus the other night on Grey's Anatomy (S07E13).
We went to tape and grabbed some more screenies and it sure looks like a Focus...whose had it's carrier label taped over. No features of the OS were shown either, meaning this wasn't MS sanctioned. So this is just for you insiders out there ;-)