Verizon Wireless has the largest 4G LTE network in U.S., with the service being offered in approximately 500 markets. Moreover the carrier is expected to be finished with its deployment work in a couple of months. After it, AT&T is the second network that's offering the largest 4G LTE network, but its service is not available in even half of the total markets that Verizon caters to. Regardless, we've been seeing AT&T switch on its service in new markets at a swift place, only today it announced that its LTE service is now available in an additional 20 markets.
Ubergizmo , AT&T 4G LTE Switched On In 20 New Markets, AT&T 4G LTE Switched On In 20 New Markets