Hi. I have a jailbroken first generation iPhone that I want to update to the latest OS. The thing is, I have NO idea how to do this. The phone was jailbroken when I got it and I've never done something like this before. All I know is that if I try to update it through iTunes I will not be able to use my iPhone anymore (it's bought in a different country and then jailbreaked so that I can use it here). Can anyone help me? Are there some easy steps, or is this very risky?