Hi, I had to jailbreak my iphone 3GS when I went out of the US. It is currently running v4.3.3. Is there a way to upgrade it to v5.0.1 without un-jailbreaking it? If not, how do I un-jailbreak it? I am back in the US now, so I am fine with un-jailbreaking it, because I can always jailbreak it again if needed. In the middle, I tried to upgrade without realising it, and it became completely frozen, so I want to make sure that doesn't happen again. That time, someone fixed it for me, but now I have to figure it all out on my own!