AT&T's apparent disabling of HSUPA 3G on some of its phones may have been a temporary measure that didn't affect the iPhone 4, insiders suggested on Wednesday. The carrier so far reportedly requires just regular HSDPA, without the faster upload speeds, on its network and thus can't guarantee that the Atrix 4G, Inspire 4G or any other phone would connect properly. The iPhone 4, and most likely 3G modems, were given special exemption to the rule to run at full HSUPA rates, Engadget understood.
