i have a iphone 3g 3.1.2. im wanting to reformat my computer an put windows 7 on it, my question is, will i lose my jailbreak? because on my itunes it says i need to update to 3.1.3, so when i format an download itunes again, and then plug my phone in, will it still be on 3.1.2 or will firmware 3.1.3 come with itunes when i download it? please answer, thanks.,