I am trying to upgrade my 4th gen iPod touch to iOS 5. First I downloaded the IPSW file from iTunes.
When I press shift + "Restore" button, I get the following error:
The iPod cannot be restored at this time because the iPod software update server could not be contacted or is temporarily unavailable.
What can I do to prevent that? I have looked into the iPod update logs and see that I am getting error 1602 but don't know how to proceed.