There was a surprise guest at the AT&T Developer Summit on January 9: Microsoft CEO Steve Ballmer.
Ballmer told attendees that Microsoft and partners would be unveiling news about new LTE Windows Phones throughout the day.
Ballmer also noted that developers should expect Microsoft to continue to "move in the direction of sharing more and more technologies" between Windows Phone and Windows. Windows 8 and Windows Phone 7.5 already share the same Metro-style interface, the same HTML5 Internet Explorer browser, integration with Windows Live and Azure, and a common HTML5/XAML experience, Ballmer said. He stopped short of saying anything about the rumors that Windows 8 and Windows Phone 8 will include the same core kernel elements.
One of the new AT&T Windows Phones already is out of the bag, the 4.7-inch HTC Titan II which is due out on AT&T "in the coming months." It has a 16 megapixel camera on the back and a 1.3 megapixel front-facing camera, as well.
As revealed recently by WinSuperSite's Paul Thurrott, the Lumia 900 is just one of a handful of LTE phones coming primarily to AT&T in the next few months. The Ace is due to be released on March 18. Verizon is expected to add the non-LTE-capable Nokia Lumia 710 to its line-up in April, according to Thurrott. (T-Mobile will be the first to offer the Lumia 710 in the U.S., starting January 11.)