I have not dropped it, damaged the battery or anything like that. I came back from a weekend at my uncle's, and when I got back, my screen was white.
It's still white, and it's under a year old. I'm thinking about getting a replacement because it's a 1 yr guarantee.
Is it still like this even after you restart the phone?
Try this one too: Turn off the phone > remove microSD card > try turning it on again.