okay so i was using my 9900 outside today and i realized the touch screen didnt work, like sometime it did and other times it didnt. about 90% of the time i was outside the touch screen wouldnt recognize me touching the screen but the other 10 % it was fine. i tried battery pull, no help . and it works fine at home, only when i go outside it has problems.
I am having this issue since i upgraded to OS 7.1 no matter which version
Just hide the trackpad and see if screen works fine if so its the OS issue, same with mine
If i go back to OS 7.0 its working fine there