I was sitting in a couch and I didn't noticed that I sat down my BB fone ..
Then when try to touch it the screen stucked up and so hard to touch only the 4 keypads works so well. Because of that i turned off my fone and on it immediately but nothings has changed I still cant touch the letters i want to touch then I just turn it off again and remove the battery then turn it on and everthng is ok. It always happens to my fone.