Yes, I read all of the threads and was not having luck by waiting a few days nor by having an adequate amount of GB. I finally updated to iOS 6 on my iPhone 4 by going through iTunes and downloading the latest version. Took a while but seems to have worked. The only issue I have is that there is an icon for Passbook that has a number of features I would use but pressing the icon takes me to iTunes which then displays a message that iTunes is not available. If anyone is having trouble, I would try the update through your iTunes account. Worked for me.