BUT. If you do not have the computer you first used it with, the I pod can´t be unlocked
How Do You Unlock An Ipod?
You don't
My friend locked my I pod and it will not unlock on my computer
You can easily unlock your ipod even if you do not known the code. First of all connect the ipod to the computer you use it with. Then open itunes. The ipod will automatically be unlocked when you disconnect it from the computer. If this does not work, use ipod updator to unlock it. However, this will remove all the data from your ipod and bring it back to the factory settings.