I recently purchased a new Pearl 8100 for my sister. In the beginning there was nothing wrong with the trackball of the phone but in few weeks, it started to jam abruptly and could not work properly when needed.
So I tried several forums online to search for the simple solution and I reached here. I must say your step by step detailed instructions helped me a lot in minimizing my trackball issue. Now it is working fine and going good. Thanks again for your invaluable tips.