if scratch of course can see wan. Mine got many scratches at the area where we write stuff for SMS, really affects. sometimes write one alphabet come out some other. Well they say it all depends on your degree of usage la. If super kau lat user one month once possible kua. Oso if u very fussy about having scratchless screen protector la. Or if the screen protector really cheapo. Generally one yr once for average usage with average quality screen protector? What the others think?