When i try to text, some of the keys on the keyboard won't work when i press on it. And when i try to press on keys, it starts to control itself. I didn't press anything and it was exiting out of my messaging screen and going to random apps and calling people. I tried turning it off for awhile and i tried taking the battery out, but it still acting up. I did nothing wrong but only dropping it by accident a few times. And I already got my original phone replaced because my original phone was restarting itself over and over again. What should i do?