I have an ipod 4G 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+Restore in iTunes (10.7) 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?