Mystery, solved. That SGH-i667 'Mandel' Windows Phone that cropped up earlier in the month (and is shown above on the left)? Word on the street at that point was that it had been nixed from AT&T's lineup, but somehow, that same device actually made the trip to New Orleans. Sure enough, it debuted at CTIA as the Focus 2, a mid-range followup phone that's destined to tempt smartphone buyers to the WP7 side with a ro
