At AT&T's Foundry in Plano, Texas, GigaOM's Stacey Higginbotham got to test AT&T's embryonic LTE network (their actual 4G network). It's fast. 28.87 Mbps downstream and 10.4 Mbps up.
For the LTE demo, they were using some of the 700MHz spectrum they bought, along with the AWS spectrum they own and want to devour T-Mobile for. AT&T says it plans to cover 95 percent of the country's population with the miracle network dust—if only the government lets them eat T-Mobile—with the first trials of the network happening later this year.