I do have an anti glare protector on it...but i have had that since day 1 and never noticed this before. I have had the phone since summer.Do you have a screen protector on? Did you just buy one and install it? If you have an anti-glare screen protector it will make it grainy. If you have the ZAGG screen film then it will look grainy and glassy. It's weird... anyway...
screen protector or no?