Yesterday, my phone started freezing up. It would freeze and then eventually the screen would go black and I would have to do a battery pull. It would then start up and freeze again within two or three minutes. Even if I left it alone and didn't press any buttons or anything. After FOUR battery pulls, I decided to take the sd card out and see if that made any difference. Without the sd card, the phone runs fine. It doesn't freeze up or anything. I put my sd card into an adapter and into the computer to see if I could maybe find the source of the problem and I'm at a complete loss as to what I should be looking for. Is there something in particular I should delete?