I have zero knowledge on jailbroken phones and need help with my sister's phone. She would like to update her 3GS to iOS 5 and do not need to jailbreak afterwards. At first, we tried to update it using iTunes. It says that she has the current iOS installed. So, we then restored it then tried to update. Again, it says she has the current OS installed. Could anyone please give me a step by step instruction on how to update the phone? I would believe it's no longer jailbroken because we already restored it. But it is not letting us update to iOS 5 through iTunes. Thank you for your help.