it fell out of my pocket in class today with a case on it and when i turned on the screen, it was all glitched looking. Everything was disfigured on the lock screen and i couldn't unlock because the touch wasn't working. When i press the power button, i can still see the back arrow light up and the setting button light up. It also rings still when i get a call but of course i can't answer. Throughout the day, it got worse and now it's completely black and when i press the power, i can sometime see a bit of blue or purple. I tried removing and putting back in the battery but it still won't work.
Why is this happening and how much would it cost to have it repaired?
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