Since the arrival of the Xperia S in February, we haven't heard much in the way of high-end international phones from Sony. It looks like that might change in the near future, however, as today a new Sony device has cropped up in a Bluetooth Special Interest Group product listing, revealing a few tantalizing details.
The Bluetooth SIG product description indicates that the Sony "LT30" is "part of the premium product line", featuring "an attractive 'ARC' design with metal back cover." That certainly sounds a lot like the Xperia GX, which will be launching on Japan's NTT Docomo this month. Other details include a fairly complete list of specs -- a 4.6-inch 720p Bravia Engine screen, 1080p video recording, MHL capability, a 13MP rear camera and 720o-supporting front-facer. Approximate dimensions also place it in the same ballpark as the Xperia GX, as it apparently measures roughly 68 x129 x 9 mm and weighs 140 grams.
There's no indication as to where this product will end up appearing, but the lack of any suffix after LT30 (for example, i for international or a for Americas) suggest this thing may see release in multiple territories. Rumors also suggest that the LT30 is the same phone as the purported "Mint" codenamed device that first showed up in a leaked roadmap back in January. If that's the case, it'll likely be a high-end device with a ~€550 price tag.