The S5 in the documents shows a variant providing support for AT&T-friendly LTE bands
From Samsung's own announcement we were pretty sure that the Galaxy S5 would be available through the carrier AT&T when it would launch all over the world in April; so this isnt something that comes as a surprise to any of us. The thing we are happiest about is that with this carrier announcement, we have become sure of one thing that the highly anticipated Galaxy S5 would be arriving on time and its arrival schedule has not been disrupted as yet.
We recently saw the 5.1-inch phone surfacing in a fresh set of FCC documents which represent the Galaxy S5 in a variant with AT&T-friendly LTE bands (2, 4, 5 and 17). It also provides support for the ANT+ sensors which come in quite handy for wireless heart-rate monitors and similar things. Though this piece of information is not a sure fact but it has been predicted that the phone also includes GSM, GPRS, EDGE and UMTS, for when you can't manage a 4G signal. There are still many unanswered questions in our heads but we will just have to wait till April to see what's in store for us.