How can we upgarde a IPod 3.1.3 to a 5.0 version?
You must have a 3G iPod Touch in order to upgrade to iOS5.
As clarification, you have a 1G iPod those can only gop to iOS 3.1.3
A 2G only to 4.2.1
A 3G to 5.1.1
A 4G and 5G to the current 6.0.1
Identifying iPod models
Retrieving data ...