Sony Ericsson doesn’t have much of a presence in the United States smartphone market right now. Sure, it released the Xperia PLAY for Verizon Wireless and AT&T earlier this year, but it didn’t make much of a splash. Sony Ericsson’s U.S. position could change soon, though, if it decides to pump out a bunch of high-end smartphones. The latest rumor suggests that the company could release a phone with the model number “LT28at” that will land on AT&T later this year. It reportedly packs a number of impressive specs, including support for AT&T’s 4G LTE network as well as a 13-megapixel camera, a 4.55-inch Reality Display with a 1280 x 720-pixel resolution and a front-facing HD camera for video chats. The details come simply from a Bluetooth “End Product List” (EPL), which may or may not be legitimate, but we’re definitely hoping AT&T and Sony Ericsson announce something big during the Consumer Electronics Show next month.