Finally, iOS 6 is here for upgrade on your iPhone, iPad, iPod touch. It’s a 791 MB upgrade file which has to be downloaded via WiFi. You should have at least 2.8 GB of disk space available to do this upgrade on the new iPad.
For more information on iOS 6, visit here:
iOS 6 at Apple.com
For a hands-on installation guide, go here:
MacWorld – Hands on iOS 6 Installation