AT&T has perhaps the most confusing 4G strategy of all four major U.S. networks--Sprint is well-established with Wi-Max, T-Mobile has had its own, faster brand of HSPA+ for months, and Verizon's legitimate 4G network, LTE, is days away from a huge launch. AT&T, on the other hand, is rolling out their next-gen network in two stages. The first, HSPA+, is actually a beefed-up 3G network, meant to hold over customers until AT&T embraces its own LTE network in 2013. Theoretically, this HSPA+ network could be very quick--in AT&T's case, up to 14.4 Mbps--but our real-world tests showed that the Inspire was capable of nothing approaching those speeds. In fact, in our tests, not only was the Inspire 4G not noticeably faster than the 3G-using iPhone 4, it was actually a bit slower on average. This is due, an AT&T rep tells me, to the fact that AT&T has not actually rolled out HSPA+ here in New York. What the company calls "backhaul"--basically, hooking up the HSPA+-capable cell towers to more bandwidth--isn't finished.