Full HD device for AT&T UAProf Leaks - Galaxy S IV ?
The User Agent Profile (Known as UAProf) shows up a new, high-end device called Samsung SGH-I337. While the naming indicates this is an AT&T phone, the Galaxy S III was the SGH-I747 which is somehow naming convention change. However, the UAProf shows screen resolution of 1080 x 1920 (Full HD), which could belong to the Galaxy S IV (or, just as well, to another upcoming AT&T Samsung phone/tablet/phablet device).
We may know something more about it at this year Mobile World Congress, but we can also hear nothing during it as there was told that Galaxy S IV will have separate event than MWC.
Time will tell