iOS 4.2 has new technology to reduce the overhead of the iPhone on cellular networks, Nokia Siemens Networks revealed today. Although unpublished by Apple, the update brought a technique known as Network Controlled Fast Dormancy that helps a smartphone go quiet without going completely idle. The method keeps the iPhone in a limbo state that saves it from having to reconnect to the network, not only eliminating the flood of traffic from a reconnect but improving its battery life by limiting the necessary traffic.
