This is new. Umpteen times I have seen people complain about the iPad Air 2 vibrating. But the Mini 2? Never.
No, It's not normal, if it really bothers you, I would get it checked out.
I've owned the Air 2 and the Mini Retina. Air 2 is horrible. Anything above 3 bars not only vibrates the back of the device, but also annoyingly it vibrates the screen. Never once had that issue with the Mini Retina.
I've owned the Air 2 and the Mini Retina. Air 2 is horrible. Anything above 3 bars not only vibrates the back of the device, but also annoyingly it vibrates the screen. Never once had that issue with the Mini Retina.