iOS 4 is the first firmware in which Apple has completely cut off the support for aging original iPhone EDGE and iPod touch first-generation. Their decision of course is justified because of the low RAM found in these first-gen devices which were released back in 2007. But all is not lost as the iPhone jailbreak community has now come up with a mod, which brings the complete look and feel of iOS 4 (formerly iPhone OS 4) for iPhone 2G. The mod is basically based on the iPhone OS 3.1.3, to replicate the experience of iOS 4 on iPhone 2G (EDGE).
