AT&T has launched LTE network in Detroit, MI; Honolulu, HI; Seattle, WA; Pittsburgh, PA and Portland, OR markets as it continues nationwide 4G LTE rollout. With this new addition, AT&T LTE network is now live in 72 markets.

According to AT&T,  its HSPA+ and LTE network covers 275 million people and almost 90 percent of its mobile data traffic now runs over enhanced backhaul that supports both HSPA+ and 4G LTE data traffic.

AT&T expects its LTE deployment to be largely complete by year-end 2013.

Over the past five years, AT&T invested more than $115 billion into operations and into acquiring spectrum and other assets that have enhanced our wireless and wired networks.