AT&T has launched its LTE service in Boulder, Colo.; Hartford and New Haven, Conn.; Boise, Idaho; Bowling Green and Lexington, Ky.; Harrisburg and Lancaster, Pa.; Providence, R.I.; and Ogden-Clearfield, Utah. With this expansion, AT&T 4G LTE is now live in 135 markets.

AT&T 4G LTE is expected to cover 300 million people by year-end 2014.

AT&T currently operates both HSPA+ and LTE networks which cover more than 285 million people. Almost 90 percent of AT&T's mobile data traffic now runs over enhanced backhaul that supports both HSPA+ and 4G LTE data traffic.