I don't see any details on the body anywhere. I'm assuming the sides are in aluminium, but what about the back? I always hated the cheap android phone for their

I don't see any details on the body anywhere. I'm assuming the sides are in aluminium, but what about the back? I always hated the cheap android phone for their glossy cheap plastic feel. (Also the reason why I can't stand any case on my iPhone) But with a price point around 650$ I'm expecting some more premium feel.