Kansagor said the company would not officially announce that the service is online until after all preliminary equipment and network testing is complete.
"As you can imagine, we do a lot of network testing before officially launching LTE in any area," she said.
AT&T has spent $98 billion over the last 5 years upgrading its U.S. wireless network. So far, it has launched LTE service in 336 markets nationwide, covering more than 225 million people.
While Verizon's LTE network covers more territory, the LTE network being rolled out by AT&T has performed better in several market tests.
A recent market survey by magazines PC World and Tech Hive found AT&T's LTE network averaged download speeds of 13.15 megabytes per second, and upload speeds of 6.45 megabytes per second.
Verizon's LTE network delivered a 9.61-megabytes-per-second download speed and upload speed of 5.47, according to the study.
To use the service, consumers also need to have an LTE-capable smartphone.
Apple's iPhone 5 is the only version of that company's smartphone capable of using the high-speed network. Other LTE-ready phones include the Samsung Galaxy S4, the Nokia Lumia 1020 and the HTC One.
Contact writer Jared Hunt at busin...@dailymail.com or 304-348-4836.