iOS updates don’t work?
Have you checked your DNS already?
When iOS 5.1 came out I tried to update my iOS devices to the new version and realized that it’s not working for me. Update on 3G is not possible and when I tried to update via my cable based LAN it gave me a dialog telling that iTunes is trying to contact the apple server for verifying the update – it never ends here.
Trying around several workarounds it came out that the problems are related with my cable based internet connection. Further investigations then showed me that the DNS service I use has to be blamed: 8.8.8.8, 8.8.4.4
It’s the free google DNS service – and they are blocking the Apple Update servers… damn
After switching to the DNS of my hosting provider now everything worked as expected and the updates went through really fast.