Many of these applications were created specifically for devices that have the 3.1 software update, which include the i Phone and the second generation i Pod Touch.
Open the i Tunes program on your computer, and wait for the program to detect your i Pod Touch.
The i Pod Touch will appear in the i Tunes' source list, on the left side of the program window, when it is detected.
i OS has made great progress during these years and brought lots of convenience to our daily life.
The latest operating system is i OS which is released in WWDC 2015.