I know for sure the back is not GG4 as well as the camera glass. All of them scratches super easily. The front i believe is GG4 but i droped it once inside the car between door and the seat and it scratched the corner of the front glass. So im not sure what the hell thats going on with the z play, but i got it refunded and ordered a new one. But this time im going to put some covers on the new one. They should have really put GG4 on the camera tho. It doenst matter how good the camera is, if the glass is scratchable.