I don't find the glass back on the X to be very slippery at all in hand. My fingers stick to it quite well. It does slide on furniture, but in hand it feels pr

I don't find the glass back on the X to be very slippery at all in hand. My fingers stick to it quite well. It does slide on furniture, but in hand it feels pretty secure, especially relative to older iPhones. The 4 was easier to hold because it was just so small.