AT&T has started sending out press invites for an event that will be held on July 16th. Unfortunately, AT&T doesn't give much as far as clues that would help us guess what the event could be about. The tag line for the event is "Get ready for what's next in wireless", and the invite goes on to give a few reasons why AT&T's LTE network is all sorts of great (to paraphrase the literature).
While we don't know what the announcement might be, the only devices on the horizon for AT&T are the Nokia Lumia 1020 and the HTC One mini; so, it's possible we'll see the Lumia announced. Otherwise, we would expect more info on the buildout of the LTE network. We'll be sure to keep you posted with whatever the announcements are.
FCC OKs Cingular\'s purchase of AT&T Wireless
Things that are NOT allowed: