Ipad 3 (MC705LL/A) with ios 6.1 (10B141) - I know my os is a little older, but we tried to upgrade it several times and it refuses, checked with Apple and they suggested it would be easier to buy a new one, which is not an option with my current situation. Typically, I don't have any issues with this older system, though it tends to get buggy with some scripts or style sheet targeting.