HT5278: About the security content of iOS 5.1.1 Software UpdateLearn about About the security content of iOS 5.1.1 Software Update
Currently Being ModeratedNov 26, 2012 9:40 AM (in response to Aidan047)
Have you tried connecting your iPod to your computer or laptop? If you haven't then do so and download iTunes from here: http://www.apple.com/itunes/download/ then open it up and try to update your iPod from there.
Hope this helped if you have any other questions i will be happy to help
Currently Being ModeratedNov 26, 2012 9:43 AM (in response to Aidan047)
You should also confirm your model of iPod here:
Only the third-gen iPod touch and later models can be updated beyond iOS 4.2.1.