When jailbraking the iPhone, you use a program which injects it's explot.. I want to know, I want to test around with something, I want to get iPhone's OS and play around with some settings such as - for the last few days I have been trying to code something like "cydia" and it has gone sucessful. I'm really asking if / how would we flash iPhone OS to get our jailbrake tool on? Thank you. edit: just relised this may be a stupid question.