AT&T has been talking about its upcoming 4G LTE network for a while now, but the time for the new network's launch is finally almost upon us. Speaking at a Bank of America Merrill Lynch conference, AT&T CFO John Stephens revealed that his carrier will finally be flipping the switch on its LTE network this Sunday, September 18th. The network will initially be available in Atlanta, Chicago, Dallas, Houston or San Antonio, and AT&T says it plans to roll out LTE in another 10 markets by the end of 2011.

As far as LTE-enabled devices go, AT&T customers will be able to pick up the Momentum 4G laptop dongle, Elevate 4G mobile hotspot, or the HTC Jetstream when the new 4G network goes live on Sunday. It's kind of a bummer that AT&T doesn't currently have any LTE smartphones in its lineup, but we've been told that that'll be changing before the year is up.

Via FierceWireless