The latest rumors from Boy Genius Report suggest some juicy details about AT&T's planned devices for the first quarter of 2012.
BGR indicates AT&T is gearing up to offer yet another Windows Phone device on March 18: the 4G-equipped HTC Titan II at $199. There's word that the Samsung Galaxy S II Skyrocket HD, Samsung Exhilarate, and Sony Xperia Ion also will debut on the carrier toward the end of March, but pricing is unknown.
Lastly, the rumors note that a Sony tablet (code-named Crystal) with HSPA+ will launch on AT&T for $409. I fully believe that Crystal is the dual-screen Sony Tablet P that has evaded a U.S. launch (despite being available in Japan for several months now).
There aren't any sources listed for the rumored information, but BGR has built a bit of a reputation for itself with several credible road map leaks in the past. Regardless, we still recommend you take this news with a grain of salt until things become official.