AT&T's 4G LTE network coming mid-2011 with 20 devices by year end

AT&T finally spilled the beans on the plans for its next-generation network at its Developer Summit today, an event held in conjunction with the giant Consumer Electronics Show in Las Vegas. The company says that it expects to launch its 4G network using LTE technology by the middle of the year; it just completed the deployment of its slightly-faster HSPA+ network (which AT&T also considers “4G”).