I have a blackberry 8330. My letters have been slowly not working as well. Since yesterday, none of my buttons work. I have taken the battery out to reset my phone. It turns on and the screen lights up when I plug it in. The scroll ball can scroll, but I cannot click it. When someone calls me, my phone vibrates, but I cannot answer because of none of the buttons working. I did no damage to my phone, and have no idea why this happened. Can anyone help me with what I should do?