apple
Whited00r allows iOS 5 to be installed on older iOS devices
These ARM6 devices includes the iPhone 2G, iPhone 3G, iPod touch first and second generation. Even better news is that this custom built iOS 5 does not require users to jailbreak their phone. In fact the download was been built and packaged in such a way that all you’d have to do is install it through iTunes just like any regular ole’ software update.
If you’d like to download Whited00r for you old iOS devices, you will be able to find the download link at their website. The list of features and installation guide can also be found at their website for those who are curious.