Hello, Im new a this Iphone thing and Jailbraking... I have an IPHONE 3G 3.1.3. I want to Downgrade it to 3.1.2 but when I google 3.1.2 I get a lot of download web pages but what I get is not the .ipsw extenxion... Please anybody tell me how can I get those file and how to jailbrake it ... Thanks I will apreciate... 