I had this phone for a few months and it has been working really good but recently I dropped my phone at knee level. The screen did not crack but I noticed that there is a horizontal line about the size of my pinky finger that us unresponsive on the top of my phone. Please help! Anyone know what it is? This phone has been working well for me! What can u do to fix it? I tried turning it on and off. Do you think it was the digitizer? If so how much would it cost to fix?