AT&T and Microsoft have been ramping up a new ad campaign to highlight the brains, beauty and fun of Windows Phone 7 handsets from the mobile carrier.

Although these ads primarily feature the Samsung Focus, AT&T actually carries three Windows Phone 7 handsets.  The LG Quantum has a slide out QWERTY keyboard and the HTC Surround has a slide out speaker.

There has already been one commercial from this new series featured here on the site – What If? and the newest commercial to join the campaign asks When was the last time your phone surprised you?

By the way, you know what seemed to be the most popular Windows Phone 7 handset amongst the Microsoft employees I met last week during the 2011 MVP Summit? Well it sure seemed like the Samsung Focus was everywhere.