Simple question that I've searched through the forums for and haven't gotten a definite answer. I'm currently on OS 3.0 and jailbroken. I do not wish to jailbreak my phone again in the future as I don't use many of the JB features anyways so can I just go ahead and push the "Update" button and update to iOS 4 without any complications? I don't care about ruining my JB chances in the future. The only thing I don't want is to brick my phone. I don't want to go the restore route because I would like to keep all my info/data on the phone. Any help is appreciated! Thanks.