iOS 4.2 Supports Cellular Network Performance Improvement Technology
In a blog post, Nokia Siemens Networks reveals that Apple's iOS 4.2 released last week supports new technology known as Network Controlled Fast Dormancy (NFCD) that can reduce strain on cellular networks ...
http://www.macrumors.com/2010/12/01/ios-4-2-supports-cellular-network-performance-improvement-technology/