I purchased the iPhone 2.1 Software Update for my 2G iPod touch. I'm not sure it was necessary. I tried to follow the download & install instructions via iTunes. However, I'm not sure it got installed. I contacted Apple customer support, & they said that based on the 2.1.1 software version number on my iTouch, it was installed. Is this correct, or is there a way a can confirm for sure that it's installed?