Hello Guys, I Bought an other box case for my s7 with the purchase of my phone on the tab a few weeks ago but took it out bc it's too heavy and bulky so I have it without it... but... I also dislike the plastic screen protector... I was gonna buy a glass screen protector but the employee denied and said that it won't work because the s7 has a curved screen... tho I thought only the edge had a curved screen... Anyways. Will the screen scratch without the screen protector? Also how good is the camera glass... or plastic... Will it scratch if I put it screen looking up? And one more thing... sometimes in the dark or when in light... the camera always seems grainy... is that normal or a defective device? Thanks in advanced!