We’ve had plenty of Galaxy S4-related rumors and leaks recently, so it was probably about time to see the first U.S.-centric Galaxy S4 reports come in. Today we’re looking at a screenshot that shows us an user agent profile, taken from samsungmobile.com, of what could be AT&T’s Galaxy S4.

Either that, or Samsung is going to have at least two Full HD smartphones on America’s second largest carrier this year. As you already know, the Galaxy S4 is rumored to come with a 5-inch Full HD display, and since AT&T offered its subscribers all the previous Galaxy S models, it only makes sense to assume that the Galaxy S4 will be in AT&T’s lineup this year.

As you can see in the image above, the SGH-I337 – very cool model number as plenty of you will certainly notice – is another Full HD handset (1920 x 1080 resolution), and since it’s part of the SGH family, it’s heading to AT&T.

Unfortunately, there’s no particular pattern to follow up on when looking at past AT&T Galaxy S model numbers, in order to see whether the SGH-I337 is indeed the AT&T Galaxy S4. The Captivate (AT&T Galaxy S) is model number SGH-I897. The Galaxy S2 on AT&T has different model numbers as follows: SGH-I777 (Galaxy S2), SGH-I727 (Galaxy S2 Skyrocket) and the Captivate Glide (SGH-I927) while the Galaxy S3 is known as the SGH-I747M.

We’ll be back with more news as soon as we have it, and since the Galaxy S4 is now said to be announced at some point in March and launched in April, chances are we’re going to get plenty of Galaxy S4 leaks and rumors in the weeks to come.