iOS 5.X.X
Discussions regarding 5.x: fifth major OS release
iOS 5 was previewed to the public on June 6, 2011.[69] This is also the second major iOS update to drop support for older devices, in this case; the iPhone 3G, and iPod Touch 2nd generation (MB & MC models). It was released for iPhone 3GS, iPhone 4 (GSM and CDMA), iPhone 4S, iPod Touch (3rd and 4th generation), iPad, and iPad 2 on October 12, 2011