IPad Air 2 has three processor cores, 2GB RAM

[Eug]

It's part of the quick settings menu. Both mute and orientation lock.

This is different from the other iPads, where it's only one or the other (because there's also a physical switch).

 

[Narse]

The default changed, yeah, but you could change it back to rotate, which I liked. I'd rather not have to dig through the settings every time I want to read something lying on my side, for example, while muting something is fast enough just with the volume switch.

Swipe up from the bottom, press the lock. No digging through menus at all.