I had trouble earlier today, trying to get this update to work. Then I rebooted the phone and tried again and it worked fine. So, you may want to reboot your phone and try that option. One other thing I did when it worked, is that I allowed the update to start on its own. There's a message that comes up, advising that it will start in 2 minutes or something, then you get to say OK, Defer, or reject. I did nothing on the time it worked. The prior times, I clicked the OK, it started the download, and then somewhere in the middle, it stopped. I think the reboot probably did the job, but just in case the other option helped, I mentioned it. Not rooted.