I'm confused. normally once you jailbreak you cannot update.. You normally need to erase up update. dud I read we can do iOS 7 updates with iTunes? how exactly can this be done? or did I read wrong? I also assume we still cannot upgrade from iOS 6.1 jail broken to iOS 7 without erasing? that's usually the case.
You have to restore via a local file preferably to iOS 7.06 using DFU mode. This will cause you to loose all the information on the device requiring you to restore a backup as well as jailbreaking the device again with the current EvasiOn file.