iOS 6 wasn't supported on the iPad because of the graphics and RAM, since the iPad had 256MB RAM and was pushing a 1024x768 resolution on 1GHz single core Apple A4 chip it couldn't handle 6.0. The iPhone 4 with 512MB RAM, 800Mhz and 960x640 resolution could handle it,and the iPod touch with 256MB RAM, 800Mhz and 960x640 (runs iOS 6.0 but crashes a LOT and suffers the low memory alert in Diagnostics) and the iPhone 3Gs with 320x480, 600Mhz and 256MB RAM, should run 6.0 fairly decently...iOS 7 should be supported on iPhone 4, 4S, 5, and iPod touch 5th gen., and iPad 2, 3, 4 and mini, because the A5 since it was "re-debuted" (In late 2012) and is dual core, should be supported till iOS 8 at least on the iPhone 4S, iPod touch 5th gen, iPad mini...the iPad 2 is very questionable, same with the 3.