I have an iPod 4th generation which is never jailbroken with iOS 4.1 and want to update it to 5.1.1. I downloaded the .ipsw file. On clicking ⌥ alt/option + Restore in iTunes (10.7) and selecting the .ipsw file, I get the following error:
This device isn't eligible for the requested build
I have tried editing the hosts file by adding a
# in front of
18.104.22.168 gs.apple.com but the error still persists. Any suggestions regarding this?