Hi all, I have attempted, rather unsuccessfully, to upgrade an iphone 4 (model no. MC603) that I just bought from a friend. Before it was given to me it was restored through itunes to version 4.3.3 (8J2). It is locked to the bell network in Canada and I would like to use it on Koodo. I thought the best/most economical way to do this would be JB and then unlock it (which I understand can be done for free once the phone is JB'en). Ideally I would like to update it to the best/most recent iOS version that can have a untethered JB (iOS 6.1.1 I think?). Initially I tried 5.1.1 through itunes --> error 3194 So I changed the host file when logged into admin so that there was a # in front of any apple related ip --> error 1600 So I tried these directions: http://itekaz.blogspot.ca/2013/02/iphone-restore-itunes-error-1600-solved.html --> error 11 I haven't been able to find a fix for error 11, and really I would just like to scrap 5.1.1 and update to a more recent version. Thanks in advance for help/advice that is offered.