If your version of i OS is current, the screen tells you so, and you don’t see those buttons.
To see which version of i OS is installed on your i Pod touch, choose Settings→General→About.
At the height of its popularity, the i Pod made up almost 50% of Apple's revenue.
Now that the smartphones and tablets we use every day have the ability to store and play music, the i Pod's glory days are over.
(usually on the i Phone with 1.1.1 firmware downgraded from 1.1.2) Baseband firmware on the IPSW is higher than the baseband firmware on the i Pad/i Phone.
To see which version of the i Pod system software is installed on an i Pod nano or i Pod classic, choose Settings→General→About from the i Pod nano Home screen or Settings→About from the i Pod classic main menu.The fastest way to find out if the version of i OS on your i Pod touch is the most recent version, choose Settings→General→Software Update.If a new version of the software is available, you see the Download and Install button.By Tony Bove You should always keep your i Pod updated with new versions of the software that controls the device — which is i OS for the i Pod touch, or the i Pod system software for an i Pod classic, i Pod nano, and i Pod shuffle.New versions often include bug fixes as well as new features. Here is a list of i Tunes errors that could appear when you restore i Phone, i Pad and i Pod Touch using i Tunes. Occurs when you want to install a beta firmware with i Tunes for Windows (actively blocked by Apple; beta users are developers and therefore must have a Mac). Check the USB connection and try other direct ports or maybe the USB cable is an older one. This error can also happen when you try to restore an i Pod with hardware dfu. or You are trying to update to a beta firmware without UDID activation.