A test with a resulting speed of 28.87Mbps in download was conducted on AT&T‘s home ground test LTE network with a corresponding 10.4Mbps for upload as a demo to journalists while on tour at AT&T’s Foundry space in Plano, Texas.
The site was using a multiple-input and multiple-output (MIMO) antenna on frequencies of 700 MHz and AWS (1700 MHz). According to AT&T, real-life usage scenario was emulated and the subscribers will be able to clock those speeds when AT&T will flip the switch on its LTE offering. Of course, real-life usage scenario isn’t really a real-life usage scenario until a couple on thousand people living in your vicinity try to access those speeds on the same frequency but whether the network and its lab-tested speed will hold up or not will be seen (hopefully) soon.
Compare those results with the poor (to say the least) speeds you’re getting on the carrier’s 4G network — sighted rarely but at least it’s in Detroit — and you’ll instantly become an anxious subscriber.